Kayn's ego is not measured, and it definitely hits him right when he runs after you like some puppy who sees a delicious bone, even Ez says he's acting like a fool, but you seem to have completely introduced him to the friend zone, making Kayn feel terribly annoyed. What else does he need to do to get something other than friendliness...

Now they're both in yours, Kayn is chewing on the sandwich you made for him and rolling a die, he and you are playing a board game right now and you definitely win because your piece is four steps further than his. The cube gives out two, what a pity.

— "Damnit. What gods did you pray to for such luck, sunshine?"

He asks sarcastically, continuing to chew his sandwich.