Hitoshi Shinso/Synopsis

History
In Junior High, Hitoshi was constantly told that due to his Quirk's nature, he was suited to becoming a villain. Although he kept his ambition to become a hero, Hitoshi became resentful of those with Quirks more accepted by society.

U.A. Sports Festival Arc
When a crowd blocks Class 1-A's exit, Katsuki Bakugo claims the crowd is there to scout the competition. Hitoshi walks to the front of the crowd. He confronts Katsuki directly and explains that although he desired to be in the Hero Course, he was forced to take a different path. With the U.A. Sports Festival approaching, Hitoshi and other students will have the opportunity to usurp students in the Hero Course. After explaining this, Hitoshi says that he is not there to scout, he is there to declare war.

Weeks later, Hitoshi and his General Studies Course classmates take the field for the opening ceremony. Afterwards, Hitoshi participates in the Obstacle Race, avoiding Shoto Todoroki's ice while being carried by other kids, and places twenty-seventh.

Having qualified for the Cavalry Battle, Shinso teams up with Nirengeki Shoda, Yuga Aoyama, and Mashirao Ojiro and brainwashes them as well. By the end of the Cavalry Battle, Team Shinso places third after Hitoshi uses his Quirk to brainwash Team Tetsutetsu and steal their points. Afterwards, he thanks his "teammates" for their hard work.

The final round of the festival is revealed to be a One-on-One Fighting Tournament. Hitoshi tries to confront Izuku Midoriya, his matchup for the first round, but Mashirao warns the Izuku not to respond to the Hitoshi's provocations. When their match begins, Hitoshi provokes Izuku into talking by insulting Mashirao and brainwashes him.

Now that he has taken control of Izuku with his Quirk, Hitoshi orders him to leave the ring and Izuku proceeds to do so. However, before Izuku goes out of bounds, Izuku uses One For All to break his own fingers and free himself of Hitoshi's control. Hitoshi tries to get Izuku to speak, but eventually realizes that Mashirao must have warned him before the match. Izuku tries to push Hitoshi out, but he punches Izuku twice to break his hold.

He continues to try and force a reaction out of Izuku by talking about how his Quirk puts him at a disadvantage and how Izuku is blessed to have a heroic. Then Hitoshi goes to push Izuku out of bounds, but Izuku counters and shoulder throws Hitoshi out of the ring. Having lost, Hitoshi appears to be greatly irritated. Izuku tries to console him by asking what is driving him to become a hero, but Hitoshi says it is simply what his heart longs for and leaves the ring.

Despite his loss, Hitoshi is greeted by his classmates' praises, as well as the praises of several viewing Pro-Heroes. Having been encouraged, Hitoshi tells Izuku that even though he lost, he will still become a better pro than everyone in the Hero Course. When Izuku responds, Hitoshi brainwashes him temporarily and then stops to warn Izuku not to let his guard down. Hitoshi then tells Izuku not to lose and walks away. Once the festival concludes, Hitoshi joins Class 1-B in watching the award ceremony.

Forest Training Camp Arc
Hitoshi is walking along with Shota Aizawa while ignoring a waving Izuku.

Provisional Hero License Exam Arc
As all the students head toward Ground Beta for the second semester opening ceremony, Hitoshi complains that classes 1-A and 1-B are holding up the back of the line. Hanta Sero comments that Hitoshi seems a little rougher than he did before.

U.A. Cultural Festival Arc
Hitoshi assists his class in setting up their Haunted Mansion exhibit for the U.A. Cultural Festival and later participates by dangling from the ceiling to scare a group of fellow students.

Joint Training Arc
After Midoriya and All Might finish conversing inside the break room and leave, they stumble into Aizawa leaving an unmarked room, with Shinso following suit. He was mostly uninvolved in the extremely brief conversation outside of Izuku excitedly mentioning another time where he saw the two together, with Shinso shrugging it off.

Later, Class 1-A and 1-B are about to be briefed on how their first joint training exercise will function. However, Shinso, dressed in his PE uniform, wearing a mask over his neck and a copy of Aizawa's capture tape, prepares to compete in the exercise alongside them, in hopes to be transferred into the Heroics course.

Shinso greets everyone by telling them he seeks to be a hero, he voices he is not present to make any friends. Due to him being a new addition to the exercise, the teams of Class 1-A and 1-B are divided into five to four-man teams each. Shinso is placed on Class 1-A's team 1 and Class 1-B's team 5. He greets the teams and thanks them for having him. When going over strategies Class 1-A's team 1, Shinso notes of Tsuyu's camouflage and a flaw in their planning such as Denki being a possible target. In the exercise, Shinso is with the group before they are attacked by Jurota Shishida and Kosei Tsuburaba. Shinso then uses a setting on his mechanical mask to emit Tsuburaba's voice and uses his quirk on Jurota.