# Soridata Artist Profile - Y:SY

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> **Y:SY** (Y:SY) is a South Korean Female Soloist and Idol who debuted solo in 2025. She  started in group Fromis 9. 

She was a trainee at YG Entertainment with some fans, which helped her on show "Idol School". Despite not starting the show outside of the selection ranking, by episode 4 she climbed to 3rd place.

In total, she trained for almost 8 years before debutting in Fromis_9. She did not renew with the group's new agency ASND in 2025, deciding to go solo instead.

# Personal Information

- Soridata ID: 2122
- Gender: Female
- Stage Name: Y:SY (Y:SY)
- Previous Stage Name: Seoyeon (서연)
- Full Name: Lee Seoyeon (이서연)
- Date of Birth: 2000-01-22
- Zodiac: Aquarius
- Height: ~158 cm
- Country of Birth: South Korea
- Parent Artist: Fromis 9
- Active Since: 2017
- Debut Day: 2025-11-17
- Current Status: Active

# Metrics and Achievements

- Success Rating: 0.0
*_Success is a star rating that goes from 0 (min) to 5 (max), each star represents one of the following: Sales up to 500000, Streaming score up to 700, Awards up to 5, Youtube Views up to 250 million, Yearly awards up to 7. Example: An artist with 250000 sales (0.5 stars), 900 streaming score (1 star), 8 awards (1 stars), 200 million Youtube views (0.8 stars) and 6 yearly awards (0.85 stars) would be rated ~4.16._*
- Time to Success: Not reached or 'nugu'
*_Time to Success measures the duration from debut until an artist reaches their first major milestone: reaching #1 on the Circle Chart Weekly, achieving cumulative sales of 100000 units, or winning a music show award (whichever occurs first)._*
- Last Release: 2026-09-09
- Perfect All-Kills (PAKs): 0
- Music Show Awards: 0
- End of year Awards: 0
- Streaming Weekly data (from Circle Chart Digital, available since 2010): Artist never ranked in top 100
- Billboard Global 200 weekly data (available since 2020, counting only Korean acts): Artist never ranked in top 200
- Physical Sales (Circle Chart Album, published since 2010): 0+ units
- Total Youtube Views (from official videos): 1,232,489+

# Related Artists

- [Fromis 9](https://soridata.com/artists/Fromis-9.md)

# Links and references

- [Instagram](https://www.instagram.com/im_theyeon/)
- [Melon](https://www.melon.com/artist/timeline.htm?artistId=2019220)
- [Wikipedia](https://en.wikipedia.org/wiki/Y:SY)
- [Namu.wiki](https://namu.wiki/w/이서연)