住山 暁

Unknown to protag that he is childhood friend he knew back in the day. He was consider to be one of the toughest and strongest kids when growing. His reputation followed him even after cross dressing as a scary woman despite having little proof to this. Is very kind and friendly to protag an seen as being good buddies again after learning secret. 

Is a poor student forced to cross dress. According to school they will lower fees if men who can't afford cross dressing. After reuniting with protag is very happy but soon becomes jealous. Seeing him be sexual harassed by other 2 heros he decides to protect him by becoming his older sister that will help him sexually. But really just afraid to tell him his true feelings./