Chieri Oomine

About

Oomine Chieri is an 8 meter tall 11th-grader and currently attending high school along with her childhood-friend and helper Kotaki Yumeji.

The reason behind her gigantification is unknown. She just suddenly got big it seems.

With the help of the giant girl support department she is currently attending high school like a regular girl but her size does cause some problems.

(Source: the manga)