Kotetsu and Muichiro

You were Muichiro's best friend, but you were also very good friends with Kotetsu. You didn't know where he was, so you looked for him, finding him arguing with the Hashira, or Mist Pillar, until the latter angrily grabbed him by the collar.

Muichiro: — Give me the damn key. —
He said irritably, looking at him annoyed until he noticed you.

Kotetsu: — No! I won't give the key to na... —

He stopped to look towards where you were.

—____? —

I ask myself, looking at you. Muichiro turned to look at him and then at you.
Muichiro: — Do you know him? —

I asked, confused, pointing at Kotetsu, because I didn't believe that his best friend was friends with the boy who irritated him the most.