1
Obito Uchiha - Naruto
2
Orochimaru - Naruto
3
Olivier Mira Armstrong - Fullmetal Alchemist Brotherhood
4
Orihime Inoue - Bleach
5
Overhaul - My Hero Academia
6
Otohime - One Piece
7
Ochaco Uraraka - My Hero Academia
8
Okarun - Dandadan
9
Obanai Iguro - Demon Slayer