Shihai Kuroiro/Synopsis

U.A. Sports Festival Arc
Shihai comes in 30th place during the Obstacle Course. He teams up with Neito Monoma, along with 2 other Class B students, Kosei Tsuburaba and Sen Kaibara during the Cavalry Battle.

Forest Training Camp Arc
When Class 1-B arrives at the training camp, their homeroom teacher explains that they will be extending their Quirks and that the more they use their Quirks, the stronger they will be by breaking their limits. When Class 1-B witnesses Class 1-A's training, Itsuka asks Shota how they can observe everyone, and he explains that is the reason the Wild, Wild Pussycats are around.

Joint Training Arc
Shihai and the rest of Class 1-B arrive at the Joint Training Exercise with Neito loudly claiming that the momentum is now moving to their side. Upon selecting teams, Shihai is paired up with Itsuka, Kinoko, and Manga for the 2nd round of the training session.

As the second round starts, Fumikage and Shihai discuss the similarities of their Quirks, expressing their mutual understanding of the darkness and declaring a fated battle between themselves. The battle begins as Team 2-A sends Dark Shadow to ambush Team 2-B, Shihai takes advantage by hijacking the dark entity and uses it to counterattack against Fumikage. Momo tries to capture Shihai once he flees from Dark Shadow's body and fuses with the shadows of a nearby pipe. However, it is revealed that Shihai's declaration towards 1-A was all a ruse as he immediately switches to hiding within the shadows and attempts to drag Yuga Aoyama away from his team.

Despite this, Fumikage manages to save Yuga from Shihai's clutches using his newfound technique from his mentor Hawks. Momo then tells Yuga to shoot out his "Navel Laser Buffet", which forces the scheming hero to escape from the shadows. Toru tries to capture him but Kinoko's interference with Momo's plan allows Shihai to blend in with some dark-colored mushrooms.

Thanks to Kinoko's plan, Shihai manages to catch Fumikage off guard by swiftly dragging Yuga towards his team's cage through the dark-colored mushrooms. He later meets up with Kinoko, in which she compliments him on his success, and suggests that they take the initiative to attack the 1-A team together, since that they have kept their locations hidden thus far. Shihai questions Kinoko's conclusion, as he notices Fumikage heading straight for them. Fumikage proceeds to attack the two with Black Ankh Sabbath, which scatters both Shihai and Kinoko. Shihai attempts to find somewhere to hide, but Fumikage traps him with his cloak. Despite this, Kinoko and Itsuka's intervention allows his team to win the match.