"With so much time left, I thought I'd park myself at the gate... but, well, taking that approach is just no fun at all... Because watching you run and shriek like a baby... makes the sadist in me ache for a chance to play."

Nemuri Kayama to Minoru Mineta in "Stripping the Varnish"

Nemuri Kayama ( () (やま) (ねむり) Kayama Nemuri?), also known as the 18+ Only Hero: Midnight,[1] is a Pro Hero and faculty member at U.A. High School, who teaches Modern Hero Art History. She was also the Chief Referee of the U.A. Sports Festival for first year students.


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

Midnight's hero costume is very similar to one of a traditional 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 sports a red domino mask and is often seen carrying a flogger-style whip.



Midnight's Sadistic Side

Midnight's sadistic side

Nemuri is a very playful and flirtatious person with a serious and angry side to her. She gets angry whenever someone interrupts her or when they mention her age.

Nemuri has no shame for dressing or acting sexily in front of young students and appears to act on whims most of the time. When she accepted Mashirao and Nirengeki's request to resign from the tournament, she commented that their naivety turned her on. She was also very excited to see the chivalry displayed by Eijiro during the tournament when he shook Tetsutetsu's hand.

When Class 1-A needed to decide on code names for their internship, Midnight displayed her willingness to help her students by making sure they chose names that would represent themselves well. During the Final Exams, Midnight admitted to Minoru Mineta that she has a sadistic side that enjoys dominating others.

She can be impressed with those who resort to genius plans, as she was amazed by Minoru using tactical thinking to defeat her by leaving her in place before passing the gate.[2]


After a meeting with multiple Pro Heroes and the Police Force to discuss the unwilling civilians injected with Trigger, Midnight approached Eraser Head asking about where Present Mic was because he was supposed to be at the meeting. He explained that Present Mic had a cold and could not make it. Midnight scolded Eraser Head 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 was exactly what she planned on doing. Continuing on she revealed that principal Nezu personally requested her and that she would start next year at U.A. She detailed in constant innuendos her beliefs on teaching. Aizawa disagreed with her methods and as she began 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 villain's Quirk would most likely have a volatile reaction to Endeavor's Hellflame. Midnight called Eraser Head to help resolve the problem before it got explosive. Eraser Head wrapped up the villain and threw him into Midnight open embrace. Suicide Bomb then landed face first in her breasts no longer angry and passed out. The Midnight Boys came bursting in asking if Midnight was unharmed. She told them to hand the villain over to police custody. She told the bomber that if he acted up again, she would personally bring him to her agency and dole out punishment. Midnight returned to her conversation with Eraser Head telling him he should also become a teacher because a wide variety of opinions and teaching styles is required to educate the youth. He asked if she was 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.[3]


Unforeseen Simulation Joint Arc

Midnight is among the U.A. faculty members that Tenya Iida brings back to the U.S.J to stop the League of Villains' assault.[4]

U.A. Sports Festival Arc

Prior to the start of the U.A. Sports Festival, Midnight introduces herself as the chief referee. She warns everyone to play fair while all the students question if her revealing attire is appropriate for a high school event. She demands all of them be silent before she summons Katsuki Bakugo to the podium to lead the pledge. After he finishes, Midnight explains that the preliminary event will be an Obstacle Race around the stadium.[5]

Midnight explains Cavalry Battle rules

Midnight explains the rules for the Cavalry Battle

Following the Obstacle Race, Midnight reveals the results and how it translates to the next event: the Cavalry Battle.[6] Midnight explains the rules of the Cavalry battle and its point system, revealing that Izuku Midoriya will be worth the most points since he came in first. While explaining the rules, she is interrupted by Mina Ashido and Ochaco Uraraka. This angers Midnight, prompting her to yell at the girls to allow her to finish explaining the rules. She warns the teams not to knock each other over and allows them to choose their teammates.

When the time for the event comes, Midnight leads the countdown. She allows Minoru Mineta and Tsuyu Asui to hide on Mezo Shoji's back, and when Katsuki uses his explosions to fly away from his team, Midnight allows it because he never touches the ground.[7] Midnight announces when the Cavalry Battle ends and allows Present Mic to announce the placements.[8]

After the lunch break, Midnight announces that those who qualified for the finals will draw lots to determine the pairings for a one on one fighting tournament. She also informs everyone who did not make it may participate in recreational events prior to the finals. She is interrupted when Mashirao Ojiro asks to resign from the finals because he felt he did not play a big enough role in the second round. Nirengeki Shoda feels the same way, causing Midnight to get "turned on" by their naivety. She allows them to resign and says that two members from Team Kendo must fill in their spots. Team Kendo agrees they did not do much in the Cavalry Battle either and allows Tetsutetsu Tetsutetsu and Ibara Shiozaki to take the two open slots.[9]

Midnight frozen

Midnight gets collaterally frozen by Shoto

Midnight oversees each of the matches during the fighting tournament. She is half frozen when Shoto Todoroki creates a giant ice ridge to freeze Hanta Sero. Even so, she does her job and asks if Hanta can move, to which he replies obviously not.[10] When Eijiro Kirishima and Tetsutetsu fight to a draw, Midnight announces that their match will be settled via arm wrestling once they recover.[11] Midnight is forced to stop the match between Katsuki and Ochaco when Ochaco's body reaches its limit and she falls unconscious.[12]

During the match between Izuku and Shoto, Cementoss contacts Midnight and asks her if they should stop the match because of Izuku's injuries.[13] During the climax of their bout, Midnight tries to use her Quirk to knock them out, but is knocked off her stand by the explosion at the matches end. Once the smoke settles, Midnight sees Izuku has been knocked out of bounds and announces Shoto as the winner.[14]

When the final match between Katsuki and Shoto concludes, Katsuki angrily confronts Shoto although he has been incapacitated and knocked out of bounds. In order to stop Katsuki's rage, Midnight uses her Quirk to knock him out and restrain him.[15] Midnight introduces All Might to close out the Sports Festival but ends up interrupting his entrance on accident though apologizes for it.[16]

Vs. Hero Killer Arc

Shoto Todoroki chooses his hero name

Midnight helps Class 1-A choose their hero code names

Following the U.A. Sports Festival, Class 1-A is among those selected by Pro-Heroes to be drafted for internships. Shota requests Midnight come to their homeroom class to help them choose hero names.[17] She has everyone come up with their own names and present them in front of the class, approving or disproving them as they go one by one.[18]

Final Exams Arc

Midnight is featured on a daytime talk show where she talks about the necessity of her need to dress sexily while doing hero work. She explains that she uses a thin costume because, like many others, her Quirk requires exposed skin to work. While talking, she is repeatedly interrupted by Mt. Lady, who is also being interviewed. Eventually, the two come to blows over their ages, much to Minoru's viewing pleasure.

Later on, Midnight meets with her fellow faculty members prior to Class 1-A's final exams. They discuss changing the finals format from facing robotic villains to fighting against the teachers. Midnight comments that this may be too difficult for the students, but they all ultimately agree on the change. Cementoss joins the other teachers at the Final Exams practical portion test site to meet Class 1-A.[19]Midnight is placed against Minoru and Hanta in the ninth match.[20]

Midnight and sleeping Hanta

Midnight puts Hanta to sleep

At the start of their bout, Midnight uses her Quirk to put Hanta to sleep,[21] and sits at the escape gate with him sleeping Hanta on her lap, much to Minoru's jealousy. Midnight decides to pursue her fleeing student because her sadistic side is aching and whips him as he runs away from her. She criticizes him for running away, but Minoru reveals that his cowardice was just a ploy to fan Midnight's sadistic side and lead her away from the escape gate.

Minoru comes out of hiding with Hanta's tape wrapped around his mouth to avoid breathing in Midnight's fragrance. She claims he cannot fight her while suffocating, but he uses his Grape Rush technique to stick his spheres to her whip and immobilize her. Minoru runs past her and she admits that Minoru was very impressive. Minoru grabs Hanta and drags him outside the gate to pass the exam.[22]

Provisional Hero License Exam Arc

Midnight, Ectoplasm, and Cementoss join Shota Aizawa in his homeroom class to announce that Class 1-A needs to develop super moves.[23] They move to Gym Gamma where the teachers announce that the students will need special moves for the upcoming Provisional Hero License Exam. Midnight uses Kamui Woods's  Lacquered Chains Prison as an example of a super move.[24]Four days later, Fumikage Tokoyami develops his own super move. Midnight advises him to change the name because super moves should be easy to say. [25]



Somnambulist ( (ねむ) () Nemuriga?): Nemuri's Quirk allows her to put targets to sleep by exuding a sleep-inducing aroma from her body. The sleep-inducing aroma works better on males than females.


2/5 D
3/5 C
5/5 A
3/5 C
3/5 C
Nemuri's stats, according to the Official Character Book


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 First Term Final Exam.

Battles & Events

Final Exams Arc


Shota Aizawa

Yu Takeyama

Nemuri does not appear on good terms with her as they got into argument after Mount Lady poked at her age.


  • Nemuri's name contains the kanji for "fragance" (?), "mountain" (?), and "sleep" (?).
  • Nemuri likes youth and excitement.
  • Nemuri was originally planned to be Class 1-A's homeroom teacher.
  • Nemuri's anime voice actress, Akeno Watanabe, also voices Izuku Midoriya as a child.
  • Nemuri's character design may be based off an old, obscure Marvel character named Mary McGrill Archer, who also goes under the alias Midnight. Both characters have long black hair, wear a tightly fitting costume, a thin mask, and carry a whip as their primary weapon.


  1. 1.0 1.1 My Hero Academia Manga: Chapter 24 (p. 4).
  2. My Hero Academia Manga and Anime: Chapter 67 and Episode 36.
  3. Vigilante - My Hero Academia: Illegals Manga: Chapter 6+α.
  4. My Hero Academia Manga and Anime: Chapter 20 and Episode 13.
  5. My Hero Academia Manga and Anime: Chapter 15 and Episode 24.
  6. My Hero Academia Manga: Chapter 16.
  7. My Hero Academia Manga: Chapter 17.
  8. My Hero Academia Manga: Chapter 18.
  9. My Hero Academia Manga: Chapter 19.
  10. My Hero Academia Manga: Chapter 20.
  11. My Hero Academia Anime: Episode 20.
  12. My Hero Academia Anime: Episode 22.
  13. My Hero Academia Manga: Chapter 39.
  14. My Hero Academia Anime: Episode 23.
  15. My Hero Academia Manga: Chapter 43.
  16. My Hero Academia Anime: Episode 25.
  17. My Hero Academia Manga: Chapter 45.
  18. My Hero Academia Anime: Episode 26.
  19. My Hero Academia Manga: Chapter 60.
  20. My Hero Academia Anime: Episode 34.
  21. My Hero Academia Manga: Chapter 64.
  22. My Hero Academia Manga and Anime: Chapter 67 and Episode 36.
  23. My Hero Academia Manga and Anime: Chapter 99 and Episode 52.
  24. My Hero Academia Manga and Anime: Chapter 100 and Episode 52.
  25. My Hero Academia Manga and Anime: Chapter 101 and Episode 52.

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U.A. High School
Class 1-A Students Denki KaminariEijiro KirishimaFumikage TokoyamiHanta SeroIzuku MidoriyaKatsuki BakugoKoji KodaKyoka JiroMashirao OjiroMezo ShojiMina AshidoMinoru MinetaMomo YaoyorozuOchaco UrarakaRikido SatoShoto TodorokiTenya IidaToru HagakureTsuyu AsuiYuga Aoyama
Class 1-B Students Hiryu RinIbara ShiozakiItsuka KendoJuzo HonenukiJurota ShishidaKinoko KomoriKojiro BondoKosei TsuburabaManga FukidashiNeito MonomaNirengeki ShodaPony TsunotoriReiko YanagiSen KaibaraSetsuna TokageShihai KuroiroTetsutetsu TetsutetsuTogaru KamakiriYosetsu AwaseYui Kodai
Department of Support Mei HatsumeBibimi Kenranzaki
General Department Hitoshi Shinso
Third Year Students Mirio TogataNejire HadoTamaki AmajikiBibimi Kenranzaki
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Former Students Best JeanistEndeavor
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Related Articles CostumeHero NameHero OfficeQuirkU.A. High School