Gyaru

Um, he's been bullied in the past, so he kind of hides it.

Uh, but a small misunderstanding leads Sayo to mention Glittermon in front of his Gyaru classmate, uh, Kotoko Ijichi, and unexpectedly it catches the attention of Kei Amane.

Egichi's best friend, who proves to be familiar with the series.

So rather than dismissing him, Amane instead helps bring Egichi into the conversation as well, drawing Seio into an unexpected connection with the two classmates he had always assumed would never be kind to someone like him.