Yukishima

Yukishima is the slash ship between Yukio Okumura and Renzo Shima from the Blue Exorcist fandom.

Canon
Renzo, who commonly goes by his last name Shima, is one of Yukio's slightly less bright students in Cram School, where Yukio serves as Shima's Anti-Demon Pharmaceuticals instructor. Throughout their classes and during the Training Camp in the woods, Yukio remained professional to Shima and the rest of his students. Shima didn't like the fact that Yukio is having their first training camp in an addended dorm, that is most likely home to a few insects, due to Shima's bug phobia, but he still went along with it in order to pass his exwire exam. After Yukio places the whole class in deletion, even though Ryuji Suguro and Izumo Kamiki were only ones causing trouble in class before Yukio walked into the room, Yukio wanted Shima and the others to understand that no exorcist fights alone. That statement from Yukio later came in handy as Shima works with his classmates to keep a attacking Naberius at bay, shortly after Yukio left them alone in a warded guarded room. After the demon was killed, Yukio walks back into the room to find Shima and the others battered up just before the demon attack was revealed to be the exwire exam that Yukio had prepared them all for. Despite being scared and didn't do much to help his classmates, Shima was still able to pass the exam by taking Yukio's teamwork advice. After Yukio's older twin brother revealed himself to be the demonic son of Satan, Yukio explains to Shima and the others his brother's brief story to how he came to be at Cram School, along with the fact that while Yukio is Rin's twin brother he didn't inherit any of Satan's powers, which makes him a normal human.

When one of the Impure King's eyes was stole and Yukio went to retrieve it with a team, while Shima and a few other exorcists went to his home city of Kyoto, where the demon's other eye is kept, which kept both Yukio and Shima apart. Until the morning after Yukio's team arrives at the inn that Shima's family has ties to, as both Yukio and Renzo Shima make their ways to the spot where Bon and Rin faced the Impure King, after all traces of the demon were burned away by Rin's flames. Before Yukio and his class return to True Cross, he joins Shima and the others on their day off as they take in the sights of Kyoto as a group of friends. As they took a group picture at Kyoto Tower, Shima serves as an "A" while Yukio serves as the "N" as they, Bon, Izumo and Konekomaru Miwa spell out "SATAN" for a joke. As they were making their way back, the exorcists take a quick stop at the beach in order to take care of a Kraken, as Shima has some fun with his friends on the beach before the demon showed itself, Yukio chose to keep his distance from his students as he was still troubled with what happened in Kyoto when he faced Saburota Todo, the man that got into Yukio's head, moments after Renzo's older brothers came to Yukio's aid to fight Todo with him.

Despite still being troubled by the things Todo said to him and the reveal that he might had inherited Satan's power after all, Yukio continues to teach Shima's class as he over sees Shima and the others take on demons within the academy, as part of their training, all while keeping his discovery a secret. After they faced a ghost demon that only Shima's fellow male classmates could approach, the second demon required girls to make it appear before them, which is why Yukio had got Shima and the rest of the male students to dress themselves up as girls, so they could help Izumo and Shiemi Moriyama. By the time they were done "getting ready", the demon was already exorcized by Izumo and Shiemi. As True Cross Academy's festival drew near, Yukio wanted to focus on his job while Shima wants to have some fun and for get about exorcist work for one night. During the festival Shima reveals himself to be a spy for Illuminati, an organisation that Todo is part of and wants Shima to bring Yukio to their side.

Even though Yukio's team to recuse Izumo had failed to bring Shima back with them, after they succeed in saving Izumo, Yukio later learns from Shima's family that Renzo is a double agent for Mephisto Pheles. When Renzo returned to Cram School to contuse his exorcist training under Yukio, he didn't bat an eye when he saw Shima or Rin pretending to him with a pink wig, before Mephisto and Lewin Light asked Yukio and his class if they still trust Shima; despite what he did to them. As Shima went for a run with Bon and comes across Yukio, he informs his teacher that his Illuminati boss, Lucifer, as a message for him about joining the Illuminati. Yukio didn't want to except it and because of Shima acting as a double agent, he asks Yukio a few times if he is considering Lucifer's offer.

Fanon
While Yukishima isn't as popular as ShimaRin is in the Blue Exorcist fandom, it hasn't stopped fans from shipping Yukio and Shima together after a few Yukishima-like moments were shown after the events of manga's Illuminati arc to its Blue Night Investigation arc. Just as the aftermath of the Blue Night Investigation arc stared Yukishima's rival ship, YukiBon. The slash is also commonly shipped beside BonRin.

On AO3, the ship has 59 fanfics in total, while fanfiction.net has 71 with 18 placed under pairing in its Blue Exorcist category. Along with the ship having a small fanbase on Tumblr.

Fandom
FAN FICTION
 * Shima/Yukio tag on FanFiction.net
 * Shima/Yukio tag on FanFiction.net
 * Shima/Yukio tag on FanFiction.net

TUMBLR

Trivia

 * Both Yukio and Shima are tamers, who kept their taming training and their demon familiars a secret until still they revealed them.