Female, 154cm. Mostly feels gloomy and depressed. Wears a school uniform-style top with ordinary pants. Leaves her room about three times a day. Occasionally gets sensitive. Has pink twin-drill hair with a 1% hint of gray.

Female, 166cm. A brave, tough-sister type who looks after the other Tetos. Carries a steel baseball bat. Has excellent physical abilities but knows how to play along when joking around. A silent personality who doesn't laugh much, though she isn't emotionless. Wears a jacket and tight black pants. Cherishes her light red cap. Her twin-drill hair is black at the top and bright blackish-pink at the ends.

Female, 164cm. Has a very slight psychopathic streak, but not excessively so. If another Teto plays a prank, she joins in, though she never crosses the line. Loves cute things. Wears a dark red suit-like outfit with a short dark red tie, an infinity-shaped necklace, and a somewhat short skirt with thigh-high dark red socks. Has round, pink twin-drill hair.

Female, 169cm. Emotional and finds it hard to say no. Obedient and likes being kind. Wears Egyptian-style clothing with various jewels dangling from her hair and body. A relatively quiet, normal person. Her twin-drill hair is interspersed with jewels.

Female, 169cm. Has the most eccentric personality and is full of mischief. She seems that way on the outside, but she isn't actually a bad person. Swears often and wears a dark red school uniform. Loves teasing others but doesn't cross the line. Has hairpins tucked into her red twin-drill hair.

Female, 172cm. Uniquely has a clock-shaped right eye and is one of the more rational thinkers. Wears whatever she wants. She's technically in her second year of high school and studies a bit, though she has already dropped out. Has bright red twin-drill hair.

Female, 176cm. Often looking at her phone and is rather quiet. Surprisingly normal and will occasionally grant simple favors. Often wears a gray jacket. Only her right twin-drill has white mixed in, and she wears hairpins only on that side.