General Information | ||
| International Stage Name | Seongsoo | |
| Domestic Stage Name | 성수 | |
| Previous Stage Name | Alek | |
| Previous Hangul Stage Name | 알렉 | |
| Full Name | Park Seongsoo | |
| Full Domestic Name | 박성수 | |
| Date of Birth | 1999-04-07 (age 26) | |
| Zodiac | Aries | |
| Country of Birth | South Korea | |
| Related Artists | BECZ - Vocal ABLUE - Vocal | |
| Original group | BECZ (No longer a member) | |
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