Ryuuichi Kurosaki

Initially appearing as a stereotypical, rough-around-the-edges delinquent, this character undergoes a significant transformation after crossing paths with Akuru Akutsu and Yoshiko Hanabatake. After becoming Yoshiko’s devoted disciple and affectionately addressing her as "big sister," his tough exterior begins to melt away. While he retains his rebellious roots, his personality evolves to reveal a much gentler, albeit somewhat dim-witted, side that emerges through his close-knit bond with his new companions.