tripleS announced a new member Hsu Nien-tzu, a former Girls Planet 999 Contestant

On March 20, tripleS announced their thirteenth member, Nien, whose real name is Hsu Nientzu or also known as Nancy. She was a C-Group contestant on Girls Planet 999 and was eliminated on Episode 8.

Nien is Taiwanese-Vietnamese and tripleS's first member who is not from Korea or Japan.

On March 17, tripleS teased the new member on their SNS accounts. 

Many tripleS fans thought that the new member could be Joung Min, a K-Group Girls Planet 999 contestant, or former IOLITE member Ahee and was shocked to find out it was Hsu Nientzu instead.

• [RUMOUR] Joung Min (Previously a member of Blockberry Creative’s Bebez’) is among the trainees rumored to be the new member of TripleS! #JoungMin #TripleS #BEBEZ #GP999 pic.twitter.com/BPItlK4mvA

— girlsplanet updates ♡ (@99logs)