In his youth, Keisuke was the comic relief of his friend group. His playful and rowdy behavior complimented Shōya’s daredevil mindset and Kazuki's carefree attitude, though that also meant he would get wrapped up in Shōya’s antics. Much like his peers, Keisuke refused to accept any responsibility when Shōya was accused of being Shōko’s sole bully, very likely out of self-preservation or uncertainty.

I don't have a set voice for him, but please do make him sound like a male child!