Hanimi twins

The Hanimi twins, 123 (Hifumi) and 457 (Shiina), are children of the Hanimi family that donated a lot of money to get the Kimikage Academy founded.

It is currently unknown why they are named via numbers, and why the number "6" was skipped.

Hanimi 123
He is quite a weirdo. He collects lots of random stuff, often bringing them to the executive committee office, which then gets thrown away by Miyako.

He'd do anything to make things "interesting", which often causes problems for other people.

He has an "imouto fetish", and is looking for girls that would call him Oonichan.

He's a pervert, and a genious.