Sailor Star Fighter
- Name: Seiya Kou
- Alias: Sailor Starfighter
- Seiyuu: Shiho Niiyama
- Birthday: July 30
- Zodiac Sign: Leo
- Height: 5' 7"
- Blood type: A
- In the group: Lead Vocal
- Club membership: American Football club
- Hobby: American Football
- Favorite subject: Physical Education
- Least favorite subject: Literature
- Favorite food: Hamburgers
- Has trouble with: Girls
- Attack: Star Serious Laser