Aki Ueno (上野 あき) is the main protagonist of 3*Hearts. She is a girly girl.
- Gender: Female
- Hair Color: Blonde
- Eye Color: Blue
- Age: 14 (Season 1), 15 (Season 2), 16 (Movie)
- Birthday: September 4
- Zodiac Sign: Virgo
Aki has long, blonde hair reaching to her hips and blue eyes, she usually wears her school uniform, which consists of a white blouse, a red tie, a navy blue skirt, white socks, and black shoes.