I strongly believe that it's Dazai who consistently bullies Chuuya, but it's clear that Chuuya is openhearted and friendly despite it.
Chuuya is such a lovely character, but his impulsiveness often leads him to anger. It's kind of funny how he reacts, though!
Exactly! That combination of lovable charm and fiery impulsiveness is what makes Chuuya so adored by fans.