|Also Known As||Guu-chan (グーチャン), Xiao Yun (小筠), Froggy|
|Born||December 14, 1996|
|Occupation||Singer, Idol, Dancer|
|Associated Acts||Ice Creamusume|
Before participating in the Hello! Project Taiwan audition, Guu-chan was part of a dance troupe that performed regularly. She was still a part of it while in Ice Creamusume, though didn't participate in all of their performances after being in the group. She was one of the four finalists chosen to become Ice Creamusume.
Due to being busy with school and her dedication to achieving good grades, she didn't blog very often and she wasn't always able to participate in Ice Creamusume activities.
- Stage name: Guu-chan (グーチャン)
- Real name: Gu Yun (古筠)
- Taiwanese nickname: Xiao Yun (小筠), Froggy
- Flavor (Member Color): Mango
- Birthday: December 14, 1996
- Astrological Sign: Aquarius
- Blood type: O
- Hello! Project Groups:
- Ice Creamusume (2008-2010)
- She graduated from Elementary School on June 12, 2009.
- Her father was famous decathlete Ku Chin Shui, who passed away due to plasma cell leukemia on May 25, 2016.
- She has said she is always happy and cheerful, and that she thinks she inherited her hyperactivity from her father.
- She belonged to a dance troupe called Dong Shou Dong Jiao Er Tong Wu Tuan (動手動腳兒童舞團; Move Your Hands and Legs Children's Dance Troupe). They hold some popularity, and have appeared on television. (She appeared on TV with them before the NEW STAR auditions). Several other members from the troupe also participated in the NEW STAR auditions. The troupe also competes in dance competitions.
- She appeared in the music video for Jolin Tsai's song "Let's Move It" with several other members of her dance troupe (before NEW STAR).