Sasanami Mahiru

"I admit that I'm not a 24-hour security system, since I have to sleep at some point. But I try to keep an eye out seven days a week, anytime, anywhere."

A shut-in whose hobbies include e-commerce, video games, and celebrity gossip.
She works as a security guard at Lilja's condominium to guarantee Lilja's safety while she lives alone.
Her room is filled to the brim with all sorts of goods, but she doesn't seem to mind the mess.
When Lilja offered her a bonus, Mahiru requested that Lilja paint a picture of a monster that can make even eternal love grow cold.