- Voice Actor (CV)
- Daichuu Mizushima
- Role
- Supporting
- Identity
- Third-year Agricultural Civil Engineering student at Ooezo Agricultural High School, former captain of the Equestrian Club, and senior upperclassman to Yuugo Hachiken
Personality
Energetic and endlessly talkative
Exceptionally skilled in hands-on craftsmanship
Prone to jealousy yet genuinely dependable
Deeply accomplished in equestrian arts
Shinei Ookawa is a third-year student in the Agricultural Civil Engineering department at Ooezo Agricultural High School and the former captain of the school's Equestrian Club. Bursting with energy and rarely at a loss for words, he has a comical tendency to grow envious of his junior Hachiken's social life—yet beneath that boisterous exterior lies a truly reliable figure. His talent for craftsmanship is remarkable: he once built a fully functional doghouse for his beloved dog 'Vice-Captain' using nothing but scrap materials. Even after stepping down from his leadership role, Ookawa continues to offer Hachiken invaluable technical guidance and encouragement from behind the scenes.