Ruriko

A mysterious little maid who seems to be in the custody of Mitsuka. She is a hard worker who can do a lot of work. When she is satisfied with the work she has takes a sigh of relief and disappears somewhere.

Mitsuka likes to joke that Ruriko is the fruit of love between her and the protagonist. She is routinely offered candy by the protagonist in exchange for staying away from Mitsuka. She often competes with Ortlinde over donuts and occasionally comforts Himeko. She also enjoys resting on Mary's breasts.