Vice president of the underground student council, she is a voluptuous girl who roams around campus in an scantly outfit and whose reputation of being a sadist and a man hater is well known especially to the five boys whom she has mistreated during their detention. She is often seen with a horse whip that she uses to punishing detainees who disobeys her where Takehito is her frequent victim . She is also quite strong and a capable fighter.

During her spare time she would do a hundred or more Hindu leg squats and push ups.

In the manga, it stated she was bullied in middle school by Kate. Later Mari protects her from Kate's bullying and shows why Meiko is so dedicated to Mari.
(Source: Kissmanga)