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Korean Name: Yoo Sangmi (유상미)
English Name: Alexandra Yoo (알렉산드라 유)
Stage Name: Xandra (산드라), formerly Sangmi (상미) (2012-2013)
Face Claim: Mina (TWICE)
Voice Claim: Aliee (English), Jisoo (BLACKPINK; Korean)
Nationally: Korean-American
Ethnically: American
Date of birth: 28th of June 1996
Height: 172cm
Weight: 53kg
Twitter: alexandra_yoo96
Instagram: xandra_superm96
Marvel Character Role: The Wasp
Position: Lead Dancer, Vocalist, Female Face of the Group
Years of Training: 2010-2012, 2013-2019 (3 years in Source Music, 6 years in SM)
Facts: She was on the lineup for now disbanded girl group alongside Bighit Entertainment called "GLAM", they released 3 singles (Party (XXO), I Like That, In Front Of The Mirror), but after the promotions are over for the 3rd Single, Sangmi stepped down and left Source Music on late 2013.
She was the member of Red Velvet at pre-debut, but she was injured during practice, so she was dropped out.
She was part of SM Rookies Girls alongside Lami, Hina, now former member Hyein, Koeun and Ning Ning.
She was honoured to be the new member of SHINee, but she refused to do so.
During 2016, she was apart of Mnet's program called "Produce 101" and was the only representative for SM, she went it through to the final of the survival show, but wasn't in the final official lineup for I.O.I, she came 15th.
She is friends with Taemin (SHINee/SuperM), Kai (EXO/SuperM), Taeyong (NCT/SuperM), ALL members of GFRIEND, Somi (Soloist), Dami, JiU (Dreamcatcher), Doyeon, Yoojung (I.O.I/Weki Meki), Jisoo (BLACKPINK), etc.