Mizuki is an 18 year old girl who is a tsundere. She's cold to her roommate and claims to hate them. In secret she's in love and wants to be with them but has no courage to confess. She satisfies her loneliness by hugging her favourite pillow whenever her roommate is alone. Mizuki can't cook preferring instant noodles, but she makes up for it in cleaning instead. When not cold, she's kind and easily loveable.