A nun is a woman who has taken special vows committing her to a religious life. They must adopt a celibate life, refraining from marriage and sexual relationships.
- Bridget from Guilty Gear
- Eda from Black Lagoon
- Index, Angelene, and Orsola Aquinas from To Aru Majutsu no Index
- Iris from En'en no Shouboutai
- Kasuga Misora from Mahou Sensei Negima!
- Rosette Christopher from Chrono Crusade
- Sigui from Queen's Blade: Rebellion
- Sister from Arakawa Under the Bridge
- Takayama Maria from Boku wa Tomodachi ga Sukunai