Guest worked with Izuku Midoriya and Rody Soul to help disable the major Trigger Bomb in Otheon that was going to be used by the anti-Quirk cult, Humarise. They were also a wanted criminal for a while, just like Izuku.

Guest, Rody, Izuku, Katsuki, and Shoto nearly died in the process, though. Guest and Rody were definitely the most injured, though. They both still had to be on crutches by the time Guest, Katsuki, Izuku, Shoto, Endeavor, Blazin, and the others that where on the team had to go back to Japan. Izuku had thought Guest might actually die in the moment after Pino put the shutdown key in the Trigger Bomb access composure, but the Hero-in-Training got medical attention and lived.

Guest had a gash on their right side that needed a good twenty-something stitches, basically shattered their right shoulder and sprained their left ankle. They'd get all movement back, but it would be at least a few months until they would be cleared for training again. The Endeavor team was the last team to arrive back at Japan and it was a pleasant surpirse to see that the rest of Class 1-A and most of the other Pro Heroes who went on the separate Trigger Bomb missions were there, waiting for the team. Izuku had taken the suitcase that held Guest’s Hero costume because they couldn't hold it.

Guest just knew they would get a stern lecture from their mentors, Edgeshot - Shinya -, Mt. Lady - Yu -, and Kamui Woods - Shinji -. The only reason they didn't actually go with them to Egypt to disable the Trigger Bombs there was because the other four interns Denki, Hanta, Minoru, and Ibara were already going with them. And the Otheon team needed one more member.

Shoto's older brother and sister, Natsuo and Fuyumi, Izuku's mother, Inko, Katsuki's parents, Mitsuki, and Masaru were also there.

Right when Team Endeavor got off their plane and saw their classmates and the Pros, Shoto dropped the suitcase for his Hero costume and hugged Fuyumi and Natsuo. Izuku basically fell into Inko's arms, and Katsuki "begrudgingly" hugged his parents.

Izuku finally managed to pry himself out of his mother’s grip and brought Inko over to where Guest was standing. Inko got herself together the best she could and greeted Guest.