Takanashi Sisters

A part-timer who works at "Fancy Shop = Mary Ann".

She's a girl with a dual personality: Kururi (who has insomnia) and Suimu (who has hypersomnia) both live together in one body.

Aside from Kururi, no one has ever been able to have a conversation with Suimu, since she sleeps all the time.

"You don't have to count her as a character," says the manager.
Apparently, her family is actually rich.