UAClass A thinks it's so great. Well, let's show 'em... why we in Class B hung back and placed low in the preliminaries.
Neito has short, slick blonde hair, parted to the right on his forehead.
His Hero costume is a tux with several clocks around his waist, chest, and wrists, presumably to help him keep track of time when using his Quirk.
Neito has a dark personality. He is shown to be calm, collected, manipulative, and possibly sadistic. Like most of Class-B students, he wants to topple Class-A's popularity. He is also disagreeable, sarcastic, and vocal. He seems to be jealous of Class-A's popularity, but also worries that the fact that they are always getting into trouble will get the rest of the school in trouble too. When he hears that Class-A fails in some way, he will usually laugh out loud and passive-aggressively ask how it's impossible for them to fail since they are meant to be the superior class.
He is shown to have somewhat of an inferiority complex, as he takes whatever opportunities he can get to mock and challenge, one up and surpass anyone in Class 1-A. This even extends to mocking himself in order to mock the students in 1-A who had to take remedial lessons during the School Trip Arc, despite he himself being the only one from class 1-B having to also take remedial lessons. He's been quoted by people as being mentally unstable, but this is more than likely a joke regarding his obsession with overtaking class 1-A.
In spite of his bitterness and overconfidence, he does seem to feel threatened and intimidated by class 1-A for their skills and strength, as seen when he sighed in relief when he learned that he would not have to face them in order to gain a provisional license.
After finishing the obstacle race, Monoma places 36th, allowing him to continue onto the next event, the Human Cavalry Battle.
During the team formation, he tells fellow Class B students they should give a lesson to "those Class A snobs". Before the Human Cavalry Battle begins, he forms a team with other Class B students. Talking to Tetsutetsu Tetsutetsu he says they should participate with no hard feelings towards each other, which Tetsutetsu agrees with. Later on, he steals Tooru's headband without her team noticing. After Katsuki fails to steal Izuku's headband, he swiftly steals Katsuki's headband. Explaining to Katsuki the Class B students purposefully got left behind in the Obstacle Race so that they could study Class A's Quirks. He reveals that he knew about Katsuki's incident with the Mud Man a year ago and taunts Katsuki, asking how he feels being attacked by villains "once a year". Katsuki then decides he'll battle Neito before going after Izuku.
Itsuka tells him to stop riling up the other class, which Neito apologizes for doing, saying it is quite unheroic of him and will heed her words. Neito begins his battle against Katsuki, copying and using Katsuki's Quirk against him, sending an explosion into Katsuki's face. Katsuki tries to attack Neito again, but Neito copies and uses Eijirou's Quirk to block him and shrugs him off. Confronted by fellow student, Bondo and his team, Monoma's teammates tells them they should back off. After that, Neito tells Katsuki not to become enraged since he fanned the flames, and Katsuki says that he will be number one.
Neito says that they should concentrate on keeping the headbands they have. When Katsuki's team approaches them again, Neito comments on their persistence, saying that its not flattering. He then sees that Katsuki is right above him and warns Kousei about the danger, which Kousei responds to by creating a solidified air wall, blocking Katsuki. Seeing that the danger is gone, Neito turns away and lets his guard down. As he does, Katsuki breaks the wall and grabs two of his headbands, which shocks Neito. Neito says that all they have to do is defend their last headband to qualify. Neito comments that Hanta's tape failed to hit them, but becomes surprised when he sees Katsuki's team reach them so quickly. He tries to attack Katsuki, but Katsuki manages to grab Neito's last headband, setting his team's score down to zero. After the Human Cavalry Battle ends, Neito and his team fail to qualify for the final event.
Neito is seen sitting next to his class, watching the match between Ochako and Katsuki. He comments that Ochako was drawing Katsuki's attention downward while preparing her meteor shower of rubble to use against him so that he could not see what was going on above, saying that Ochako made sure her ceaseless attacks and smokescreen would narrow his field of vision as well. Neito says that Ochako never let Katsuki catch onto her plan.
After the match between Fumikage and Katsuki ends, Neito comments that Katsuki simply got a lucky Quirk matchup.
During the Sports Festival's closing ceremony, Neito along with his class mates are seen watching.
In the lunch room, Neito knocks into Izuku Midoriya with his elbow. He apologizes to him and remarks about Izuku, Tenya Iida and Shouto Todoroki encountering the Hero Killer, and as a result, Class 1-A's spotlight has increased. Neito mentions the attention they are grabbing isn't for expectations, but in the form of trouble. He sarcastically remarks that one day, Class 1-B will also get pulled into the same trouble as they did. However, Itsuka Kendou appears and hits him on the neck, telling Neito what happened to them isn't funny. When Itsuka tells Izuku and his classmates about the end of term test. Neito criticizes Itsuka for revealing to Class 1-A the content of the test, saying that she threw away their intelligence advantage against them, and their chance to forestall Class 1-A is gone. Itsuka drags Neito away and hits him again, telling him they don't hate Class 1-A.
When the first semester of U.A. ends and the summer break begins. On the day of the forest lodge trip, when Neito finds out about some of Class 1-A needing supplementary lessons. He mocks Class 1-A for their failures until Itsuka Kendou appears and hits him on the neck.
When Class 1-B arrives at the training camp. Homeroom teacher Blood King explains they'll be extending their quirks and the more they use their quirks the stronger they'll be by breaking their limits. When Class 1-B witness Class 1-A's training. Afterwards Itsuka Kendou asks Shouta Aizawa if can they observe everyone, he explains that's the reason The Pussy-Cats are around.
Quirk and Abilities
Copy (コピー Kopī): Neito's Quirk allows him to duplicate and use another Quirk after coming into contact with the Quirk user. After doing so, Neito gains full access to the Quirk he has copied and can use it however he likes. This Quirk also allows him to copy multiple Quirks. However, a drawback is that Neito can only use the Quirk he has copied for five minutes, and after the five minutes are over, he loses access to that Quirk. Also, Neito cannot simultaneously use two or more copied Quirks at the same time.
Neito sees Katsuki, along with the other members of his class, as arrogant, and their popularity must be toppled. However, Katsuki didn't give him much attention until he took his bandana and mocked him for being attacked by villains every year. This alone enraged Katsuki so much to the point of overlooking Izuku, whom he had his eyes on, in order to destroy Neito's team first. Later, after repeated taunting, mocking and copying of his Quirk, Katsuki's rage just grew even further and he swore again that he will become number 1, but this time he adds that he will be destroying everyone. Neito also thinks that Katsuki is a war criminal.
Neito and Itsuka are in the same class. She seems to have the habit of keeping him in check, as she told him to stop provoking Katsuki and stopped him from picking a fight with Izuku.
- His name comes from "物真似" (monomane?), meaning "mimicry". Additionally, "物間" (monoma?) means "among things". "寧" (nei?) means "repose, serenity, peace, peaceful", and "人" (hito?) means "person".
- He likes French cuisine and French-Belgian comics.
- He is based on a real person, according to Horikoshi.
- (To his classmates) "Class A thinks it's so great. Well, let's show 'em... why we in Class B hung back and placed low in the preliminaries."