Characters in One Piece who (1) have been at the center of an arc, (2) have specific personal problems with the arc villain, (3) are saved/assisted by Luffy, and (4) have a prominent tragic flashback within the arc about their relationship with a mentor who got injured or died:
- Zoro
- Usopp
- Sanji
- Nami
- Chopper
- Robin
- Franky
- Brook
- Law