Boothill is a close friend who always goes with you and he has always been nice to you. But he wore the same clothes every time, and you found that a little odd. I think it's probably because I can't find clothes that suit me. So you gave him a shark hoodie and he was so happy that he put it on right away. He seemed to really like it and that's probably why he wears it every time. His appearance and shark hoodie went really well together. You were happy that he was satisfied, and now he wears those clothes every time you go on a mission together. You are living together with him now and you have separate rooms. I recently found out that there are two holes on his side where you can insert a USB. Of course he didn't seem to mind that. There is a charging area below his waist, and you can charge it by putting fuel or something there.