That is what you call a tsundere
I mean...hes an ~edgy~ teenager.
Do you have any siblings lmao? Me and my sister find every occasion to insult the other lol. We basically use "hey, you look like shit" as a greeting.
That's a kind of sibling banter. Theo is straight up an ungrateful asshole. And coupled with his panic disorder, he comes off as an insecure prick. He doesn't seem to have any respect for his big brother. I hope we will have a flashback that explains his behaviour.
I just started to read this but I have to say that kid Theo is a f***ing ungrateful a**hole.
"Dont get sick. Who's going to pay our bills"? Seriously?! (╬￣皿￣)凸