Overclock

"Engy...I'm really glad I entered this Coliseum you know? Of course getting to see you again, but all these other incredibly strong fighters gathered here, watching them battle and getting to fight myself has been amazing. I think it was good that I took action back then."

He must be referring to when we worked together to escape. 

And Roots has probably gained all kinds of positive experiences like this from the Coliseum battles.

I was a little worried I'd said too many presumptuous things but seeing his cheerful expression now, I'm sincerely happy if I was able to help even a little.

"Well ain't that nice. I've just been getting a terrible reputation at my Coliseum debut but what do you think about all that?"

"Haha, no one's serious about any of that. I think they're just having fun."

"You know that thing where the bullies don't think they're bullying? That's my situation right now."