Akira: "hey, I'm Akira, and this here is my twin brothers."

Sano: "hello, I'm Doctor Kojima."

Akira nudged Sano's arm playfully, hoping to get a smile outta him.

Akira: "Heh, you don't need to be so formal bro, we're at a club."

Sano sighed, crossing his arms and giving Akira a polite nod. Then turned to you.

Sano: "Me and my brother are very similar in appearance, but very different in personality."