| idol_id | 1804 |
| Selca owner | stu48_riachuu |
| Pop type | J-Pop |
| Stage name (romanized) | Riachuu |
| Stage name (original) | りあちゅう |
| Real name (romanized) | Arai Ria |
| Real name (original) | 新井梨杏 |
| Birth date | 2008-10-05 (age 16) ▲ ▼ |
| Chinese zodiac sign | 🐀 Rat |
| Western zodiac sign | ♎ Libra |
| Hometown | Hiroshima |
| Height | 159.0cm (5'3") ▲ ▼ |
| Weight | |
| Blood type | B |
| Debut date | 2023-04-09 (1 year and 7 months ago) ▲ ▼ |
| Country of origin | 
Japan |
| Name | Company | Fandom | Debut date | Disbandment date | Current member | |
|---|---|---|---|---|---|---|
|
STU48 | AKS | 2018-01 | Yes |