Mizuena

"'What I mean is-- If telling me makes you suffer, then you don't need to tell me anything. But it doesn't mean that I give up! I still don't want to see that sad face of yours, and I still want to help you. Therefore... One day-- If one day you feel like talking, tell me. I will wait until then.'""- Ena to Mizuki in the 'My Footsteps, Your Destination' Event Chapter 8"

Mizuena is the non-binary ship between Mizuki Akiyama and Ena Shinonome from the Project SEKAI fandom.

Canon
Mizuki is a first year at Kamiyama High School who tends to skip school ad has horrible attendance. Ena is a second year who attends night classes at Kamiyama High school. They are both part of the music circle "Nightcord at 25:00", also known as Niigo, which also includes Mafuyu Asahina and Kanade Yoisaki. Mizuki being the animator of the group under the alias of "Amia", and Ena, the illustrator with the alias of "Enanan", the two also work on the music videos together. They are also both interested in fashion.

Mizuki is seemingly carefree, though they can act as the most mature member of Niigo, mediating the arguments. They hide a secret from the rest of the group and is afraid of them finding it out, though Ena is aware they are hiding something. Ena is strong-willed and attention-craving. She suffers from feeling that her art is not good enough, and that she is talentless. She uses her social media to escape from that feeling and to get attention and compliments. Mizuki describes her as a "tsundere". The two bicker a lot.

Secret Distance
Niigo go on a mystery tour. During the tour, Mizuki tells Ena a scary legend about the tunnel they are currently in, and Ena gets annoyed at them for telling those kinds of stories in a dark place like that. After Kanade disappears, Mizuki and Mafuyu go look for her, leaving Ena behind. Ena sees someone's shadow and starts to believe the legend Mizuki told her, until it turned out the shadow was just Kanade. Niigo then continues on their tour, with Ena getting annoyed at Mizuki for telling scary stories about the locations they visit.

On the way back, while everyone else is sleeping, Mizuki thinks about how they want to stay with Niigo, but feels that the others will no longer want to be around them if they find out their secret. Ena wakes up and notices something off about Mizuki, while Mizuki starts building a wall between them and Niigo.

Tell Me Your Problems! Exciting Picnic
Ena meets up with Airi Momoi and Shizuku Hinomori and ends up talking about her worries about Mizuki to them. They invite her to go with them on a trip, and to bring Mizuki as well. With a bit of convincing from Ena, Mizuki reluctantly agrees, despite trying to not get too close.

Quotes
"Huh? It means exactly as I said. It means that until Mizuki can tell me everything, I can wait forever."

"To be honest, I'm very bad at waiting, but I will wait specially for you. That's why -- make sure that you will tell me one day."

- Ena in My Footsteps, Your Destination Chapter 8 "(Just then, I lied to her.)"

"(Because maybe if I keep keeping it from her-- maybe I can stay by her side forever, I thought.)"

- Mizuki in My Footprints, Your Destination Chapter 8

Fanon
Mizuena is one of the most popular ships in the fandom. However, it is rivaled by other Niigo ships such as Mafuena, Mizumafu and Mizukana. On AO3, it is Ena's second most popular ship and Mizuki's most popular. It is usually shipped alongside Kanamafu. People tend to enjoy Mizuena due being entertained by their bickering. Starting from the Secret Distance event, people also started enjoying seeing how much they care about each other.

It is currently the 5th most popular ship on AO3.

Fanfiction
Akiyama Mizuki/Shinonome Ena on AO3

Art
みずえな on Twitter

みずえな on Pixiv

Trivia

 * Mizuki follows Ena's social media. They occasionally talk about it with her, usually with criticism.
 * They currently have 3 covers together, "Charles", "Keita Renwa" and "Venom". They also sing "Cell Phone Love Story" with Miku.
 * Ena's little brother, Akito, is referred to by Mizuki as "otouto-kun", which translate to "little brother-kun".