Tadakuni's younger sister

Tadakuni's Little Sister (Tadakuni no imouto) is one of the eyeless sister trio. Her name is mentioned once in the series by Yoshitake's older sister as "Mei" in the story 'High-school Boys and Siblings'.

Appearance
Tadakuni's sister is of a short and slim stature. She wears her light brown hair in twin tails and is usually seen in school uniform. She is depicted with prominent, sharp canines which are seen when she lashes out at the main trio or gets angry.

Personality
Mei tends to get overexcited when anything good befalls her, such as in Episode 8, where she throws her bag far up a tree. She is quick-tempered and is ready to resort to physical violence, especially against her brother and his friends.

However, despite her strength and brutality, many characters (maybe including her own brother) are worried about her safety. In Episode 6, when she gets into a fight with a boy from her own school, four boys from North High followed her secretly to the spot where she was supposed to meet him, so that she would be safe.

Abilities
Immense Strength: Tadakuni's sister possesses a great deal of physical strength, which often leaves the main trio in shock. She incapacitates Tadakuni with a kick to the stomach, overpowers Karasawa in another instance, and overpowers Hidenori and Yoshitake when they both try to attack her. She is also able to shake a crane game machine that the combined might of the main trio could not budge.