Nemuri Kayama

Nemuri Kayama (香山睡), also known as the 18+ only Hero Midnight (18禁ヒーロー ミッドナイト), is a Pro Hero and is a staff member at U.A.. She was the Chief Referee of the Sports Festival for Year 1.

Appearance
Midnight is a curvaceous woman with long, spiky black hair and blue eyes.

Midnight's hero costume is very similar to one of a dominatrix. She wears a black breastless leotard over a white bodysuit, which emphasizes her breasts, body, and legs along with translucent black thigh-high stockings and black knee-boots. She has a small mask outlining her eyes, a handcuff on each wrist, and a utility belt around her hips. She is often seen carrying a flogger-style whip.

Personality
Midnight has a very flirty personality. However, she also has the tendency to make angry outbursts, such as when someone else interrupts her and when someone mentions her age. She seems to act on mere whims sometimes, as seen when she accepts Mashirao and Shouda's request to resign from the tournament event just because she liked their reasoning. Midnight has shown to be sadistic, as she enjoyed seeing Minoru run away in fear.

History
A year prior to starting her teaching career Midnight was called into a meeting with Best Jeanist, Manual, Deathtegoro, Snipe, 13, Endeavor, Buster Hero, Eraser, Ingenium, and Gunhead, They were there with an unnamed police officer to speak about the unwilling civilians injected with Trigger. The officer explained that the people in question were more of victims than villains. Endeavor argued that any public use of a quirk is illegal and that they should treat them as villains and let the police investigate the backgrounds of future captures. He said this is the only way to protect the innocent while not risking themselves through hesitating every time they see a knew enemy. All Might, who was not present, had his reply to the problem delivered by Naomasa. He stated that he would assess the situation at the scene more carefully because as heroes they must not bring harm to innocent citizens. This was in direct opposition to Endeavors answer greatly angering him. After the meeting ended, Midnight approached Eraserhead asking about where Present Mic was because he was supposed to be at the meeting. He explained that Present Mic had a cold and couldn't make it. Midnight scolded Eraserhead on his attire. In response he teased her saying she should become a teacher or something if she likes counseling others so much. Much to his chagrin she told him that's exactly what she plans on doing. Continuing on she revealed that principle Nezu personally requested her and that she would start next year at U.A. She detailed in constant innuendos her beliefs on teaching. Aizawa disagrees with her methods and as she begins a rebuttal; a Suicide Bomber attacked the police station. Endeavor still fuming over what had just transpired decided he was going to incinerate the villain. However, the villains quirk would most likely have a volatile react to Endeavors quick. Midnight calls Aizawa to help resolve the problem before it gets explosive. Aizawa wraps the villain up throwing him into Midnight. By this point she has undone her blouse revealing her chest. Suicide Bomb then lands face first in her breasts no longer angry and passes out. The Midnight Boys come bursting in asking if Midnight is unharmed. She tells them to hand the villain over to police custody. She tells Bomb if he acts up again she will personally bring him to her agency and dole out punishment. Bomb is clearly not upset by this but the Midnight boys become increasingly jealous. Midnight returns to her conversation with Aizawa telling him he should also become a teacher because a wide variety of opinions and teaching styles is required to educate the youth. He asks if she is joking saying if he became a teacher that would be the epitome of irrational. The next day he was told Midnight had submitted a recommendation for him to the principal thus starting his career as a teacher.

Unforeseen Simulation Joint Arc
Midnight appears along with the other Pro Heroes when Class 1-A is attacked by the Villain Alliance.

Sports Festival Arc
At the beginning, she tells everyone to play fair during the Sports Festival. The students question her "+18 only" tagline, and ask whether it is fine due to them being in high school. She yells at them and tells them to be silent. She then calls Katsuki, the player representative for the Freshmen, up to the stage. Midnight is then seen explaining the rules of the Human Cavalry Battle and suggested to go for the one that took first place.

Midnight is seen again announcing that they will be doing drawings to determine the pairings for the tournament event and says that before the tournament begins, recreational events will take place first. She then says that the sixteen participants in the tournament event do not have to partake in the recreational events and can abstain from the events if they wish and there is no problem if they want to rest and save their energy. After Mashirao and Shouda request to resign from the tournament event, Midnight, liking their reasoning, accepts their resignations. She then says that the open slots will be filled in by the team that placed fifth: Team Kendou, but Team Kendou decides to give the opportunity to Team Tetsutetsu. Midnight then announces that Tetsutetsu and Ibara will be replacing Mashirao and Shouda. Midnight then shows the pairings for the tournament event.

During the match between Izuku and Shouto, Cementoss contacts her and asks her if he can stop the match, saying that Izuku's serious injuries would prevent him from being able to fight in the next match even if he wins. Midnight thinks about it and eventually decides to continue the match.

After Shouto is knocked out of bounds and Katsuki angrily grabs him, Midnight knocks Katsuki out with her aroma to stop him from doing anything to Shouto.

Field Training Arc
At the request of Shouta, Midnight comes to Class 1-A's classroom to evaluate their Hero Names.

End of Term Test Arc
On the day of Class 1-A's test exercise, Midnight is one of the teachers that Class 1-A will face in their end of term test exercise. Midnight will face Hanta and Minoru in their test exercise.

Minoru, Hanta, and Midnight arrive in an uninhabited city where Class 1-A's test exercise will take place. In the city, Midnight explains the 30-minute test; Minoru and Hanta must either handcuff her or one of them must escape the battlefield within 30 minutes in order to win and pass the test. The test begins.

Midnight uses her Quirk to put Hanta to sleep.

Midnight is sitting at the escape gate with a sleeping Hanta on her lap, much to Minoru's jealousy. Suddenly, Minoru is whipped by Midnight who has decided to chase after him after she gets excited from seeing his fear. He tries speaking, but stops when he realizes that the moment he opens his mouth, he will become susceptible to her sleeping gas. She criticizes him for running away. However, he tells her that his cowardice and his lack of courage was all part of his plan to lure her away from the escape gate and Hanta, all in the name of becoming a cool Hero. He charges at her with Hanta's tape wrapped around his mouth to prevent him from inhaling her sleeping gas. As she whips at him, Minoru uses his move Grape Rush (which involves throwing his sticky substance from his head at the opponent while running towards them). His move hits her whip and hand, causing her to become attached to her whip and stuck in place, allowing him to run past her. She is impressed with his strategy, and Minoru takes off the tape, grabs Hanta, and drags him out of the escape gate, allowing them both to pass the practical test.

Hero License Exam Arc
Midnight along with All Might, Cementoss and Ectoplasm, were the repossessed by training class A and B students to develop their Quirks and special techniques before the provisional hero license test.

Quirk and Abilities
Somnambulist (眠り香): Midnight's Quirk allows her to put targets to sleep by exuding a sleep-inducing aroma from her body, as shown by her need to tear her own bodysuit around her left arm in preparation to activate it to stop Katsuki. The sleep inducing aroma works better on males than females.

Equipment
Whip: Fitting her dominatrix theme, Midnight wields a flogger-style whip in combat and is skilled in wielding it. She also used a bullwhip-style whip during the End of Term Test Arc.

End of Term Test Arc

 * Minoru Mineta &amp; Hanta Sero vs. Midnight: Lose

Trivia

 * Midnight's name contains the kanji for "fragance" (香), "mountain" (山), and "sleep" (睡).
 * Midnight likes youth and excitement.
 * Midnight was originally planned to be Class 1-A's homeroom teacher.
 * Her anime voice actress, Akeno Watanabe, also voices Izuku Midoriya as a child.