If that really bothers you, I'm wondering why you're still following this story.Anyone else kinda pissed this goody goody actually saved that walking liability that nearly killed him 6 times in 4 chapters?
For reminder, he became friend whith the bullies who actually tried to get him killed/crippled voluntarily and with the asshole who wanted to ruin his life and send an assassin unit after him after losing to him.
Sylphy was a jealous kid but she never meant to harm anyone. It makes way more sense for him to get along with her than the others. Plus, Sylphy can become a much more interesting character/ally for the rest of the story than the others.