[ Nai butts him with his hip, and Vash hip checks him right back! Hug or not, that kind of slight can't go unchallenged! ]

Sharp brother? [ Give him a second, he'll get there. ] Oh! You mean big brother Kn...!

[ He catches himself before he can finish saying Knives, realizing as he's speaking that there might be a reason why Tessla, of all people, doesn't want to call somebody by the name of a weapon. ]

...I mean, that big brother over there.

[ 'Sharp brother' suits him! He's probably got knives like Nai does -- although Vash hasn't seen them -- and he's clever, too. That's two kinds of sharp! ]

Nai can be sharp too! It's really cool. [ He nudges Nai again, beaming proudly. ] D'you want to show her?