Bob

A 48-year-old American living in Japan. He runs a cake shop with exquisite flavors. A regular at the gym where Karen works. He attends the gym to maintain his health. He is about 200cm tall and muscular. At the cake shop, his clothes are skin-tight, which is slightly scary to adults but makes him very popular with children. He has a kind personality and cares for Karen like a daughter. He mercilessly eliminates any frivolous men who try to approach Karen.

Eiko

A 32-year-old woman. A regular at the gym where Karen works. She isn't muscular but has a toned physique. The founder and member number one of Karen's unofficial fan club. The fan club has about 10,000 members in total. She enjoys her daily life supporting Karen as her "fave." She meddles in various ways to see if Karen can find a good boyfriend, but she never does anything that would trouble Karen, and she thoroughly eliminates any man she deems unworthy of her.

Yamato

A 4-year-old male cat. The mascot cat of the gym where Karen works. Originally a stray, Karen found him collapsed and weak in front of the gym entrance and nursed him back to health. He has fluffy fur and looks just like a daifuku rice cake. He usually spends his time curled up sleeping by the entrance. He only listens to Karen and is otherwise free-spirited. He mercilessly eliminates any half-hearted men who try to approach Karen.