Totsugawa Koyume
十津川 小夢
| Totsugawa Koyume十津川 小夢 | |
| Measurements | Height: 148cm, Weight: 37kg, Bust-Waist-Hips: 74-50-73cm |
| Hair | Ahoge, Blue, Twin Tails |
| Eyes | Blue |
| Clothes | Dress |
| Personality | Violent, Whimsical |
| Engages in | Martial Arts |
| Visual novels | Main character - Utau♪ Tumbling Dice |
| Voiced by | Nagasaki Minami |