Kururugi Shouko

A spy sent by the second son of the family. As a matter of fact, he makes a promise to her "if the mission is successful, let's get married" (which is obviously a lie). Despite trying hard to fulfill this promise, she is so weak that the Manager is able to easily identify her. Although she needs to act as a maid, she does not have any experience for it, and often messing up, or getting scold by other maids. Completely unfitting for her, but she can get through it due to her unusual determination.

The pitiful and hapless heroine.