祐美子

"Please don't talk so loudly. Taro-san, you must have been quite surprised."

The second youngest daughter of the four sisters living in the mansion. Out of the four sisters, Yumiko is the one with most common sense, and the one who also shows most concern to both Taro and Shiro. However, she isn't torturing both of them because of her own will, but only because Hana forces her to do it. Not to mention, whenever her sisters go out of control or just act way too crazy, Yumiko is always the one who protects Taro, insisting it isn't his fault.