Birthday
Jul 14
2005
20 yrs
Zodiac
Cancer
Height
158 cm
Weight
42 kg
Nationality
South Korean
Real Name
Lee Yoon-seon (이윤선)
About
On September 19, 2025, it was reported that Yoonseon joined Monster Brain and became a member of their pre-debut girl group S2IT. They are scheduled to debut in January 2026. On November 27 she was introduced as a member of the group, now using the stage name Haru.
On March 14, 2026, she debuted in S2IT with the release of their first digital single What I Want.
Other Members
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