Because I think that their relationship is (or definitely could be) something special. It’s been a while since I actually read BnHA but if I remember correctly,
Kirishima is the first one – or the only one – who isn’t bothered at all by bakugo’s rude nature. And he is apparently also someone who bakugo actually has a soft spot for. Kirishima is the only one he became friends with at UA. Which is something that Izuku noticed btw – that’s how he knew that Kirishima needed to be the one, extending his hand to save bakugo and it couldn’t be anyone else. I think that might’ve been the moment I started shipping them – cuz I did notice their relationship but I didn’t think too much of it until another character remarked on it. That’s what made me think “oh okay, we’re supposed to notice that this relationship is special”. I also definitely remember a scene, after the rescue mission, when bakugo gives Kirishima some money to either cheer him up or to compensate for a camera or smth that he bought for the mission – which was his convoluted way of showing he cares, I think.
As much as I hate bakugo (and think Kirishima could do sooo much better
lbr) I try not to let that stop me from looking at their relationships
objectively and basically, out of all of bakugo’s relationships, the one he has with Kirishima stands out to me the most – in a positive way, that is (don’t get me started on his “friendship” with Izuku, that one is beyond fucked up) – and vice versa. Maybe I’m being overly optimistic but I think his relationship with Kirishima has the potential to change bakugo for the better.
Cheloneuniverse 