@Voooo In my opinion ricky is one of the most decent characters besides the protagonist. I mean, yeah, I'm not going to deny that he's a crazy psychopath, but on the other hand, he's one of the secondary characters who has shown the most humanity, if not the only one. He is the only one who has genuinely cared about Hojoong (at least not in such a... selfish way), the only one who has looked after him and protected him, at least in his own way. And it's also one of the few where Hojoong can feel a little more comfortable, where he can be genuine, himself, without suffering every second. I'm not saying all his experiences with him were very pleasant, but compared to his other encounters with other characters, they are at least the nicest, so to speak 😓 (except for the first time they met) 
I'm a mantecol lover