Setsuna Tokage/Synopsis

U.A. Sports Festival Arc
Setsuna finishes the Obstacle Race at 39th place. It is later revealed by Neito that she was a part of the group of Class 1-B students who went along with his plan to hold back in the Obstacle Race so that they could observe Class 1-A's Quirks and tendencies. She teams up with Itsuka Kendo, Kinoko Komori, and Reiko Yanagi for the Cavalry Battle, and doesn't object once Itsuka suggests for their team to allow Team Tetsutetsu to participate in the 1 vs. 1 battles in their place.

Forest Training Camp Arc
Setsuna is seen with Yui Kodai, Kinoko, Pony Tsunotori and Reiko when Classes A and B are heading out for the school trip. On the second day of the training camp, she listens along with the rest of her class as their homeroom teacher explains that they will be training their Quirks.

U.A. Cultural Festival Arc
Setsuna participates in Class 1-B's original play, "Romeo, Juliet and the Prisoner of Azkaban: The Return of the Kings!".

Joint Training Arc
Setsuna, along with the rest of Class 1-B are pitted against Class 1-A as part of the Joint Training Exercise. She is placed in the fourth round of match-ups. As the fourth round begins, she tells her teammates that the first team to make a move will win. She leads an ambush against Katsuki and his teammates, being fully aware of Kyoka's Quirk and came up with a countermeasure by creating a lot of noise to trick them. Setsuna then uses her Self-Amputation Qurik and splits herself into many pieces to attack Katsuki and the rest of the Class 1-A team. They struggle to fight back because her pieces are too small to target. She then tells her team to take out Kyoka first as she is the most troublesome.