All the other Hashira's were mature even Muichiro was but suddenly some big buff blinding man decides 'Oh you have to be flashy', 'Oh just live your life', 'Oh I'm so cool, wanna take me on' as if he's your big brother or something

No matter how much you yell at him or push his hand away, he's always ruffling your hair and teasing you. Just like an older brother

"You know, you can be a real brat sometimes. You're lucky I even deal with unflashy individuals like you."