Toshimitsu Yamada is an 18-year-old male student born in 1966. He attends Jō-Higashi Private Technical High School as a third-year student in Class F-30. Within the school's social structure, he leads as the head thug. Physical characteristics, family relationships, pets, and distinctive personal history remain unspecified. Personality traits, motivations, internal development, background story, significant experiences, and narrative evolution across official media or adaptations are not detailed.