Yua Aida (あいだゆあ - Aida Yua) (born August 12, 1984 in Aichi Prefecture, Japan) is a Japanese model and adult film actress who took the AV world by storm when she debuted in photo layouts in 2003, and the January 2004 DVD Pichi Pichi. Appearing in over 30 DVDs within a year, as of 2006, along with Sora Aoi, she is the most popular figure of the S1 studio. According to her official websiteBirth location:
Aichi, Japan| Birthdate: | August 12, 1984 |
| Measurements: | 88-57-87(cm) 35-22-34(inch) |
| Height: | 1.57 m (5 ft 2 in) |
| Eye colour: | Brown |
| Hair colour: | Brown |
| Natural bust: | Yes |
| Blood Group: | O |
| Orientation: | Heterosexual |
| Ethnicity: | Japanese |