- Full/Birth Name:
- Yoon Siyun
- Korean Name:
- 윤시윤
- Group:
- AMPERS&ONE
- Position:
- Vocalist
- Birthday:
- Jan 8, 2005 (21 years old)
- Height:
- 180 (5ft 11in)
- Stan Rank:
- 185th
- MBTI:
- ISTJ
- Origin:
- South Korea
- Bio:
- Siyun is a vocalist in AMPERS&ONE, born in Incheon, South Korea, and a former contestant on Treasure Box.
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