Yamashita

Yamashita (山下 Yamashita) is a main character of Ueno-San wa Bukiyou. She often acts as the wingwoman to Ueno, participating in experiments to help her get through to Tanaka, although occasionally, she requires payment.

Personality
Yamashita is usually low energy. She is often seen reading books with bizarre titles. She is easily scared, and seems to dislike the extreme experiments. Whenever something perverse happen around her, she is quick to accuse Tanaka and Ueno of sexual harassment. When Tanaka acts dense, she will become angry, and hit him.

History
In flashback Chapter 50, Yamashita meets Ueno and Tanaka when she wanders into the science club room during the Cultural Fesitval before her first year. She leaves confused, but joins afterwards.

After enrolling in the school, she is placed in class with Tanaka's sister Mizuna.

At some point, she decided to help Ueno with Tanaka.