Osoro Shidesu

Osoro is the eighth rival and leader of the delinquents. To most people, she's known as the strongest and most dangerous girl in school, who had allegedly beaten a number of people on her first day at school. In reality, her closed-off and intimidating persona is most likely the result of her growing up in a poor and abusive family. She had no close friends prior to her current "cronies", and has no interested in making friends in present time; however, she seems to have warmed up to them over time.

Osoro will not be present for the first seven weeks as Genka Kunahito, the guidance counselor, had suspended her in order to be able to reform the delinquents while their biggest negative influence, Osoro herself, isn't present at Akademi. The exact way how she will meet Senpai and what he sees in her is currently unknown, however, Osoro is hinted to have a "different side", most evident in the alternative line in the introductions video and her relationship with her "cronies", as the structure of the group reminds much less of a gang than a club or a friend group.

Voice Reference - https://youtu.be/Aa7ovZGvY6o?si=GtGlWfELBFYg30s5&t=119