MitsuKoko

MitsuKoko is the het ship between Mitsuru and Kokoro from the DARLING in the FRANXX fandom.

Canon
Mitsuru and Kokoro were in different FRANXX pairings at the start of DARLING in the FRANXX. They barely interacted with each other as they had little need to and shared no common interests. Mitsuru was sort of a lone wolf who often headbutted Hiro and Kokoro was a shy, quiet girl who was afraid to voice her opinions, usually just going with the flow.

After Mitsuru got traumatized by piloting with Zero Two, Kokoro started showing concern for Mitsuru's well being, which Mitsuru brushed off, thinking she was just pitying him. When Squad 13 was rewarded with a short getaway at the beach, Mitsuru found the remains of an abandoned city and wanted to do some exploration. Kokoro voiced her fears of the place, to which Mitsuru coldly told her she didn't need to come if she was afraid and added that he couldn't guarantee anyone's safety. However, Mitsuru managed to save Kokoro from getting crushed by a falling bookcase in an old clinic later, implying he had been following her closely. He also noticed Kokoro had picked up a book about childbirth and reproduction - banned information but chose not to mention it.

During the Boys x Girls fight, Kokoro and Mitsuru bumped into each other at the greenhouse. Kokoro wondered if Mitsuru had an interest in flowers and proceeded to explain the 'language of flowers'. When she realized Mitsuru didn't seem to be listening she asked if he was going along in the fight, to which he replied he found the fight stupid and couldn't be bothered about it. Kokoro praised him for his bravery, stating it took a lot of courage to refuse to toe the line. As he walked to leave the greenhouse, Mitsuru found Kokoro kept the book from the getaway despite it undoubtedly being against regulation when it dropped out of her pocket. When Kokoro admitted she had indeed kept the book, Mitsuru didn't alert their caregivers about it, stating the book didn't involve him and agreeing to keep it a secret. While not stated, it is implied that Mitsuru's bravery of refusing to toe the line might have given Kokoro the courage to speak up to her fellow pistils to end the fight. Squadmates Ichigo and Ikuno notice this, even commenting on how unusual it is for Kokoro to be so assertive.

Whilst on a special mission to defend the S-Planning facility, Mitsuru collapses due to 'child fever' and puts Chlorophytum out of commission. Even after recovering, testing finds he and Ikuno's sync rate has dropped so low Hachi notes he could become a pruning target. This along with a few other factors led to Nana suggesting the option of a partner shuffle between the members of the squad. Even after promising to be Futoshi's partner forever, Kokoro volunteered to try riding with Mitsuru, shocking the entire team and bringing Futoshi to tears. As with his other squadmates, Mitsuru was unable to open up to Kokoro. On their first mission after Partner Shuffle, MitsuKoko's FRANXX (Genista) acted as rear support. However, they had problems fighting and they disconnected following Mitsuru blindly crashing Genista head-on after failing to eliminate klaxosaurs. The klaxosaur was about to crush them with its foot when Chlorophytum ran in to protect them, saving them.

Inside Genista, Kokoro turns to reconnect, but Mitsuru tells her he's incompetent and shouldn't get her hopes up. Kokoro refutes his claim, telling Mitsuru to lean on and trust her more, to which Mitsuru revealed the childhood promise Hiro broke. He revealed that incident shattered his faith and he couldn't bring himself to trust in anyone, fearing his trust would be broken again. Kokoro comforted him, saying they weren't perfect and these things were bound to happen. Hence they shouldn't dwell in the past.

Kokoro reaffirmed that she believed in him and reconnected to Genista. However, Mitsuru didn't connect with Kokoro and Genista went into stampede mode. Even though Kokoro was getting hurt during the stampede she didn't stop, even after her squadmate told her to, wanting to prove Mitsuru's competency. Luckily, Mitsuru intervened and pulled her off the machine before she could get seriously hurt. As MitsuKoko lay on the floor, Mitsuru looked up at Kokoro and asked how she could trust someone to the point of hurting herself, to which Kokoro smiled sheepishly. Mitsuru smiled back at her, commenting he found her unbelievable. MitsuKoko reconnects and their para capacity levels shoot to the maximum. Genista is reactivated and blasts a bigger hole in the klaxosaur to reveal its core. Strelizia leaps in to land the finishing blow and eliminates the klaxosaur.

Upon returning to the FRANXX hanger, Kokoro's former partner Futoshi, berated Mitsuru for making Kokoro (as Genista) blindly smash into the klaxosaur. Following Futoshi's yelling, Mitsuru promised to protect Kokoro as long as they were together, shocking both Kokoko and Futoshi. Although he made it sound like he was just saying it to pacify Futoshi, it is implied he really meant it.

After this incident, MitsuKoko grew closer. Often seen positioned next to or near each other in most scenes, MitsuKoko back up each other's statements and encourage each other during battle. Most notably, they learned from each other, as observed as Kokoro learning to speak her mind bravely and Mitsuru opening up to and trusting his squad mates.

After the first battle of the Gran Crevasse, Squad 13 was on standby at Mistilteinn, awaiting further orders. By this time, MitsuKoko has grown much closer to each other and their conversations are much deeper and serious. In fact, they are so close Mitsuru requests a haircut from Kokoro, something which is seen as intimate in Japan. When Kokoro finishes, she smiles as she keeps her scissors. When Kokoro gets up, Mitsuru compliments handiwork and says she's very kind. Kokoro is taken aback by Mitsuru's words and seemed flustered. Dropping to her knees, she kisses Mitsuru on impulse. Mitsuru is surprised, but his reaction does not seem positive. Kokoro notices this and gets embarrassed, apologizing as she ran off. Later when the girls are bathing at the lake, Miku laughingly asks if they had seen Mitsuru's hair. Kokoro giggles awkwardly as she'd cut it herself, to which Ikuno commented she thought it looked good on him.

In the evening, Miku wonders what would happen to them if their food rations stopped being dropped off weekly. Zero Two announces the only choice they'd have then would be to make their own food together. At first, Zorome seems sceptical about whether they can pull it off, but Hiro agrees to Zero Two's suggestion. Mitsuru adds that he remembers seeing some cookbooks in the library, to which Kokoro exclaims perhaps they could do it after all. Everyone happily agrees to Zero Two's suggestion, except Zorome. Kokoro uses her knowledge of plants to make a salad out of edible plant parts while Mitsuru makes a salad dressing using their food rations. When Squad 13 sits down for dinner, Miku tastes their salad and says it's good. Kokoro cheers and smiles at Mitsuru, glad their joint effort worked out.

After the 9's arrived at Mistilteinn, MitsuKoko knew their time at Mistilteinn was running out. They were seen in the greenhouse again, Kokoro brushing Mitsuru's hair and chatting. Mitsuru says he'll be a bit sad to leave since they only began spending time together after they were left to fend for themselves. Kokoro smiles. Kokoro explains she read that boys and girls can create new life by joining their bodies together and makes a sexual proposal to Mitsuru. Gulping, Kokoro unzips Mitsuru's uniform, saying she believed procreation represented hope for them. Mitsuru felt extremely uneasy at this point, so he shoved her hand away, standing up and asking what she's doing. After Zorome reminds Mitsuru of water duty and catches them in the act, Mitsuru asks Kokoro where'd that came from and was shocked to hear Kokoro had been thinking about it for a long time.

Mitsuru later meets Hiro while on water duty. After a chat, Hiro helps Mitsuru realize he was in love with Kokoro. This put his mind at ease on his feelings and made him even more determined to support and make Kokoro happy.

Upon returning to the boarding house, Mitsuru and Hiro found the rest of the squad gathered in the living room. Following, the 9's came in and berated Kokoro for keeping the baby book. That was when Kokoro confessed to her squadmates that she wanted to have a child so she could 'leave her mark on the future'. Since Kokoro hadn't directly told him about this, Mitsuru was shocked and confused. Upon hearing Kokoro's intentions, Nine Alpha called Kokoro disgusting for trying to defy Papa, their avowed leader. Mitsuru tried to stand up for Kokoro, but not before Ikuno attacked Nine Alpha. This required their caretakers to intervene and break up the fight while interviewing Kokoro about rebelling against Papa.

Kokoro was taken away and interrogated for several hours before being released. At night, Mitsuru found Kokoro crying in one of the sealed off rooms. Kokoro tried to apologize for 'trying to force Mitsuru into it and told Mitsuru to leave her alone, but Mitsuru wouldn't hear any of that. As Kokoro got up to leave, Mitsuru said he wouldn't leave her alone and pulled her into a hug, telling her to lean on him more. He told her not to decide things on her own and expressed his desire to make her happy. As Kokoro cries, she wonders if creating new life was really such a bad thing and if they were allowed to think of their future. Mitsuru chokes back his tears and kisses Kokoro. After consummating their relationship, MitsuKoko is later shown lying naked in each other's arms. Following this incident, they start meeting at the abandoned room in secret to spend their nights together.

Before Squad 13 leaves Mistilteinn for the Bird Nest, they decide to hold a wedding for MitsuKoko as suggested by Hiro. Upon hearing this, Futoshi cries and says if they're happy, he's happy too, even volunteering to play the role of the priest for their wedding. Everyone chips in for the wedding preparations and takes a group picture together at the side of the boarding house. On the day of the wedding, Mitsuru shyly looks at Kokoro in her wedding gown. After applying their final touches, Kokoro links arms with Mitsuru and tells him to find happiness together. As they walk down the aisle arm in arm, their squadmates throw sakura petals and ring bells to welcome them. Mitsuru and Kokoro exchange the rings Mitsuru made earlier and proceed to seal their wedding vows with a kiss. However, APE crashes the wedding and takes MitsuKoko away for indoctrination. Squad 13 tries to fight back but are outnumbered by APE's soldiers and the 9's.

Squad 13 are sent to the Bird Nest and wait weeks for MitsuKoko's return. When Mitsuru and Kokoro do return, the squad's worst fears come true. They realize all of MitsuKoko's memories of each other had indeed been removed. MitsuKoko not only do not remember their relationship prior to the mindwipe, but they also don't even recognize each other and are confused when their squadmates tell them they were FRANXX partners previously. They are later seen talking to each other, supposedly getting to know each other better.

After settling down at the Bird Nest, MitsuKoko takes off their wedding rings, puzzling Futoshi. Kokoro gets nauseous from morning sickness and runs to the bathroom to throw up. Ikuno mentions it has been happening a lot lately and Ichigo suggests Kokoro take time off the upcoming mission. Kokoro states Papa sent her back even after erasing her memories, so she must fight to death for him. Miku is shocked and exclaims that none of them belonged to Papa because Kokoro and Mitsuru showed them so. However, Kokoro doesn't remember the wedding and is perplexed.

MitsuKoko stands in front of Genista in the FRANXX hangar. Mitsuru enters Genista and reassures Kokoro they will be able to connect since their squad mates state they were FRANXX partners before. Kokoro does not say anything and rubs the base of her finger where she used to wear her wedding ring. The 2nd battle of the Gran Crevasse is cutthroat due to the klaxosaurs' sheer numbers and huge sizes. During the battle, Mitsuru compliments Kokoro for fighting well and calls her by her nickname. By doing so, he recalls his erased memories and triggers a painful flash. The pain and the shock catch him off guard, causing him to disconnect from Kokoro. As Genista struggles to regain control, Kokoro asks Mitsuru what is happening. She calls him by his nickname and gets the same painful flash too. MitsuKoko surmises the pain is caused by saying each other's names. Bewildered and terrified, Delphinium supports Genista and orders Chlorophytum to take care of them. While Genista does not continue in the fight, it is part of the mission to bring Zero Two to Hiro.

Following the 2nd battle of the Gran Crevasse, APE and all the adults, with the exception of the caregivers, left for space. Hence, the parasites were left to fend for themselves. At a meeting, Kokoro becomes nauseous due to morning sickness and excuses herself. Mitsuru gets up to check on her out of concern but stops himself and the meeting resumes.

The next day, the parasites are working in the fields again when they discover the remains of a klaxosaur and a VIRM soldier which killed each other. Kokoro collapses due to nausea and Miku rushes to her aid. As Kokoro drifts in and out of consciousness, Mitsuru reaches out to Kokoro and calls out her name despite the searing pain in his head. When Kokoro comes to, she is in a hospital ward surrounded by her squad mates. The new Nana says her urine sample revealed traces of hCG, a hormone only secreted during pregnancy. When Kokoro seems confused, the new Nana explains Kokoro is pregnant and cannot pilot a FRANXX anymore. Upon hearing this, Mitsuru realizes he fathered the unborn child and falls to the ground in shock. Kokoro reacts in a similar manner, grasping her sheets tightly. The new Nana adds past records indicate abortion as the treatment used and asks Kokoro to inform her once she made a decision. As the new Nana leaves, Kokoro calls for help out of fear and confusion as she is in a dilemma on what to do next. Mitsuru sits on the floor, shell-shocked, as Miku asks the boys to leave the room.

As the boys walk down the hallway, Mitsuru stops and looks to Hiro. Even though he doesn't remember anything, Mitsuru still feels guilty and asks Hiro what to do, but Hiro can't answer him either. That night, when Kokoro is left all alone in her room, Mitsuru tries to talk to Kokoro but is too scared to. The next day, Squad 13 leaves for space to help Hiro rescue Zero Two, but Mitsuru and Kokoro stay behind. As Kokoro decides to keep the baby, she does not join the squad in this mission as she is no longer able to pilot a FRANXX. Mitsuru explains he feels it is his responsibility to take care of Kokoro, to which Kokoro coldly replies it can't be since they don't remember past memories of each other. It is worth noting that at this point, Mitsuru and Kokoro seem to have 'swapped roles' in their relationship. Prior to the Partner Shuffle, Kokoro would reach out to Mitsuru and try to comfort and support him in the period when he was struggling to pilot, but Mitsuru would coldly reject her. Now, Mitsuru is trying to reach out to Kokoro in attempt to show support and concern during the time she struggles with the choice of abortion or keeping their baby, but Kokoro rejects his help.

More wounds appear on Zero Two's body and Kokoro struggles to keep up with them. The battle in space intensifies and causes a giant thunderstorm on Earth. Despite this, Kokoro still stays by Zero Two's side despite the ill effects the rain might cause to her body. Mitsuru runs to Kokoro's side and tells her to get inside or she might fall ill. Kokoro doesn't listen, saying since she couldn't pilot anymore she was pretty much useless and wanted to make herself useful by using her body to protect Zero Two. Mitsuru tells Kokoro if she's useless, he's useless too. He adds, however, he's found his reason to live - to protect Kokoro and their baby's future. Mitsuru takes out his wedding ring from his right pocket and proposes to Kokoro again, causing her to cry and take out her ring too. The pocket Mitsuru took his ring from was the same one he touched after failing to talk to Kokoro after her hospitalization, implying he'd tried to do the same thing then but did not have the courage to.

Kokoro asks why Mitsuru still had his wedding ring and why he would still say her name even though it hurt him. Mitsuru replies even though he feels he's a weakling and doesn't really know what 'love' means, he feels that if they're together they'll be able to walk through any storm. He adds that this is their battle and he'll call her name as many times as she wants. Kokoro cries as they interlock hands and cry out each other's names. When the storm passes, MitsuKoko watches Zero Two walk towards the sky and her body turn into a statue. They are later seen holding hands behind the statue, wearing their wedding rings.

After this incident, Kokoro warms up to Mitsuru and Mitsuru becomes more protective of Kokoro, to a point where Kokoro has to tell him not to worry so much. As Kokoro's pregnancy progresses, Mitsuru finds excuses to spend time by Kokoro's side and at times has to be dragged back to the fields by Zorome and Futoshi. 245 days after Hiro and Zero Two enters the warp gate, Mitsuru rushes to Kokoro's hospital ward. Upon reaching, he sees that Kokoro has given birth to their baby girl. Kokoro refers to Mitsuru as 'papa' and tells their daughter he's here. When their daughter reaches out and holds his finger, Mitsuru is overwhelmed with joy and cries. After leaving the ward, Futoshi congratulates Mitsuru for being the first parasite to become a father. Over the next two years, MitsuKoko happily raises their daughter together.

2 years after HiroZero entered the warp gate MitsuKoko's daughter, Ai, helps MitsuKoko realise Zero Two's statue is somehow linked to Zero Two in space. MitsuKoko calls the rest of the parasites up, joining hands with each other to send their thoughts and prayers to HiroZero. After HiroZero's sacrifice, Kokoro drops to the ground, crying as she was touched by the sacrifice made. Ai comforts her and Mitsuru kneels down to her side to comfort her too.

8 years after HiroZero's sacrifice, the parasites have a reunion at a school ceremony. MitsuKoko is shown to have three children, with a fourth on the way. As Zorome and Miku argue, MitsuKoko giggles. After the school ceremony, they stand next to each other with the rest of Squad 13, recalling the lessons HiroZero taught them.

Fanon
It is a highly popular ship in the fandom, having entered the weekly top 10 anime ships popularity charts and peaking at first place. It rivals FutoKoko, though the latter was sunk as of the Partner Shuffle.

The ship gained much popularity after MitsuKoko's first kiss, entering the top 10 list that week. The ship shot up from 7th place to 1st place the very next week after MitsuKoko consummated their relationship. MitsuKoko has the 3rd greatest number of fanarts of the Darling in the Franxx ships, behind HiroZero and IchiGoro.

When the ship started is often disputed. Some fans argue MitsuKoko only really started after the Partner Shuffle, while others claimed it started during the Beach Getaway or even as early as Episode 04 when Kokoro became concerned for Mitsuru's wellbeing.

The Darling in the Franxx fandom is quite divided on this ship. Some have applauded the ship's gradual development, while others criticized it for progressing faster than even the main couple of the show. Many of the ship's critics say they were too young to consummate their relationship and have children at such a young age, while fans say no legal age of consent existed in the post-apocalyptic world of theirs, so they weren't in the wrong. A few even went on to say MitsuKoko's act of rebellion was the first step in rebuilding the world. Other viewers simply dislike it because Mitsuru and Kokoro have completely opposite personalities, hence they didn't seem like a good match, while MitsuKoko shippers note how their personalities rubbed off each other towards the end.

Children
Series' finale shows Mitsuru and Kokoro have three children plus one on the way. Only one of them has their revealed name for now:

Ai
Ai is the firstborn daughter of Mitsuru and Kokoro. She is also the first naturally born child to the Parasites after APE's departure. Ai is the Japanese word for "love" (愛). Mitsuru and Kokoro named her after this in honor of Hiro and Zero Two's relationship.

Ai was born 245 days after Hiro and Zero Two left in the warp gate. Although Mitsuru and Kokoro did not know what to do when Kokoro's pregnancy was first announced, Kokoro decided to keep the baby. Despite their rough start, MitsuKoko managed to form a loving relationship and take care of their newborn daughter.

Ai seems to have telepathic abilities as she was the one who alerted everyone to pray for Hiro and Zero Two in space. Then, Ai is 18 months old and playing in the fields next to Zero Two's statue when she senses something is amiss. She runs up and pats Zero Two's statue, repeating the word "darling" over and over again, to the surprise of her parents, as she'd never learnt that word before. MitsuKoko surmises the statue of Zero Two is connected to Zero Two in space and call everyone to send their thoughts and prayers to HiroZero.

Ai is a lovable and precocious child who is loved dearly by her parents. She is a kind-hearted little girl from young, as seen when she comforted her mother Kokoro after HiroZero's sacrifice. In the MATO comic, Ai is also portrayed to be curious and enjoys listening to stories as she asked Miku to tell her stories about her parents.

Unnamed Son
MitsuKoko had their second child, a son, shortly after HiroZero's sacrifice. He was first seen being carried around as a baby by Kokoro whilst she talked to Miku. While his facial features are not shown, his hair as a baby was similar to that of his older sister's, Ai - with the same hair colour and same bangs shape. Many fanarts of the MitsuKoko family have his eye colour the same as Kokoro's, making him Kokoro's 'guy version'. During the school ceremony, he sat on his dad Mitsuru's shoulders.

Unnamed Daughter
MitsuKoko had their third child sometime after their second. While her exact age is unknown, she is of school-going age 10 years after HiroZero entered the warp gate. She was seen sitting on Kokoro's lap during the school ceremony, reading the picture book Zero Two illustrated. As her hair and eye colour take after Mitsuru's, she is Mitsuru's 'girl version'.

Unborn Child
10 years after HiroZero entered the warp gate, the parasites have a reunion during a school ceremony. When Ikuno, Ichigo and Futoshi chat, Futoshi mentions MitsuKoko are having their fourth child. As this fourth child is never mentioned or shown later, their appearance and gender is unknown.

Fandom
FAN FICTION

PIXIV
 * ミツココ tag on pixiv.
 * ミツココ on pixiv encyclopedia.

TUMBLR

Trivia

 * Kokoro is the first parasite to give birth to a child naturally in close to a century.


 * Kokoro's code number is 556 and Mitsuru's code number is 326. When added together, it gives 882. 882 can be read as "hahani" without the diacritic and means "to become a mother". With the diacritic, "hahani" becomes "papani" and means "to become a father". This foreshadows the birth and conception of their child.
 * With a different kanji, "hahani" also means "rebellion". Consummating their relationship was an act of rebellion against APE as Papa had banned any relationships besides FRANXX partners.
 * Kokoro and Mitsuru are the youngest parasites to parent a child, at 15 years 7 months and 15 years 11 months respectively.