World Trigger Episode 4 English Subbed Episode Title:A-Class #5: Ai Kitora of Arashiyama Unit.Episode Description:Kitora pushes Mikumo to be punished for using his in-training Trigger outside his current C-rank status, but Kuga berates her. Later, she waits for Mikumo to escort him to the Border headquarters. As Kitora reveals to him and Kuga about the irregular opening of portals around the city, a bomber-type Trion Soldier, called Ilgar, emerges from a portal. She intercepts Ilgar, while Mikumo decides to help evacuate the area.