I couldn’t really, like, illustrate an answer to both of the questions here… Plus I just didn’t have any ideas I was happy with for the part about Hiro, which is why Yoichi mentions Hiro making new friends in the studio. For all the Camp Buddy boys, I have some ideas for similar characters they might get along with (like Kiba, here, who shares Yoichi’s passion for dogs). I think looking to shared interests is probably better than trying to match people based on having a similar personality, since I feel like people who are too similar tend to butt heads. If I was gonna pair him with someone who has a similar personality, I probably would’ve used Bakugou, but picturing them hanging out, it just seemed like they’d fight all the time. I feel like personalities like theirs need a calming presence (Kirishima for Bakugoi, Keitaro for Yoichi), and that dynamic works better.
I also felt Yoichi would have to have a nickname for Kiba. I dunno if “triangle-face” is what he’d use (I don’t like that it’s a bit too similar to torch-head), but I felt it would have to be about the markings on his face, and that was the best I could come up with. ^_^;