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CHECKMATE Members Profile

CHECKMATE Members Profile: CHECKMATE Facts

CHECKMATE (체크메이트) is a co-ed group under GRACE COMPANY Entertainment. They currently consist of 4 members: Sieun, Suri, Yongseok and Noah. They debuted on September 21st, 2020 with “DRUM”. On December 18th, 2021, it was announced that the group had disbanded.

CHECKMATE Fandom Name:
CHECKMATE Official Fan Color:

CHECKMATE Official Accounts:
Instagram: checkmate_official__
Twitter: @GraceCompany_ (Company’s Official Twitter) / @checkmate_tweet (Members’ Twitter)
TikTok: @checkmate_official
Facebook: Checkmate체크메이트
Fancafe: CHECKMATEofficial

CHECKMATE Members Profile:

Stage Name: Sieun (시은)
Birth Name: Maeng Sieun (맹시은), later legalized as Lee Si Eun (이시은)
Position: Leader, Main Vocalist
Birthday: September 19, 1993
Zodiac Sign: Virgo
Chinese Zodiac Sign: Rooster
Height: 163 cm (5’3”)
Blood Type: B
Instagram: @fallin__see

Sieun Facts:
– She is a former member of RAMISU.
– She is a former pre-debut contender for Rendezvous.
– Her shoe size is 220-225 mm.
– Her hobby is listening to music.
– Her role model is Taeyeon from SNSD.
– She relieves stress by sleeping in a bed.
– Her favorite and least favourite seasons are spring and winter respectively.
– Her favorite movie genre is thriller.
– She wants to visit Okinawa, Japan.
– Her favorite fruit is apples.
– Her favorite color is pink.
– Her favorite animal is a Munchkin cat.
– She does not like to eat mushrooms.
– Sieun calls herself an “interpreter for Suri” as Suri sometimes forgets to get to the point when she’s talking, but Sieun understands and can explain it more clearly to the other members. (‘you’ media showcase)


Stage Name: Suri (수리)
Birth Name: Kang Su Ri (강수리)
Position: Main Rapper, Main Dancer, Vocalist
Birthday: October 11, 1994
Zodiac Sign: Libra
Chinese Zodiac Sign: Dog
Height: 168 cm (5’6″)
Weight: 49 kg (108 lbs)
Blood Type: B
Instagram: @suri__kang

Suri Facts:
– She was born in Daejeon, South Korea.
– She is a former member of the pre-debut disbanded girl group Rendezvous.
– She is a also former member of AMOR.
– She can do taekwondo.
– Her role model is Ariana Grande.
– She is the “boy group dance master”.
– She practiced ballet for a short time.
– Her favorite animals are dogs and cats.
– She likes to listen to Tinashe.
– She said she has bad eyesight and needs glasses.
– She raises cats in her house.
– Self-proclaimed energy girl.
– She’s good at sports, especially taekwondo and boxing. (Rendezvous interview)
– She always has a stuffed toy called Metamong in her bed. (Rendezvous interview)
– Her hobby is going to coffee shops. (Rendezvous interview)
– Her favourite music genre is hip hop. (Rendezvous interview)
– Her favourite film is “Titanic”. (Rendezvous interview)
– She first heard the song “Flowerpot” by Alex in elementary school and cried after listening to it, thus, it became her favourite song (Rendezvous interview)
– Sometimes she forgets the mention the subject when she’s talking to Sieun has to be her “interpreter” and explain what she means to the other members as she knows what Suri is trying to say. (‘you’ media showcase)


Stage Name: Yongseok (용석)
Birth Name: Choi Yong Seok (최용석)
Position: Main Vocalist, Visual
Birthday: May 23, 1996
Zodiac Sign: Gemini
Chinese Zodiac Sign: Rat
Blood Type:

Yongseok Facts:
– He is the member that talks the most in videos.
– Yongseok said he’s the ‘sexy charisma’ of Checkmate. (‘You’ Media Showcase)
– Members call him a dragon stone.
– He said that BTS inspired him to become an idol.
– He said he never wants his fans to regret falling for Checkmate.
– His hobby is providing manual therapy to the members (he learnt some techniques from his friend who does manual therapy). (‘You’ Media Showcase)


Stage Name: Noah (노아)
Birth Name: Hwang Seung Dae (황승대)
Position: Lead Vocalist, Maknae
Birthday: March 18, 1998
Zodiac Sign: Pisces
Chinese Zodiac Sign: Tiger
Blood Type:
Instagram: @noah__ss__d
Twitter: @noah__ss__d
Facebook: 노아
노아TV NOAH seung dae

Noah Facts:
– When asked which character he was most like he said Harry Potter.
– His favorite season is fall because it is good for exercising, walking and other activities.
– Yongseok said that when Noah feels good/comfortable he slides down into the chair that he is sitting in.
– Suri bought friendship rings for all of the members, but Noah lost his ring. (‘You’ Media Showcase)
– Noah has his own personal instagram, tiktok, twitter, facebook and youtube channel.
– He’s currently a trainee under One Cool Jacso Entertainment.

Former Members:

Stage Name: Nason (네이슨)
Birth Name: Kim Du Yeop (김두엽)
Position: Lead Dancer, Vocalist
Birthday: June 12, 1995
Zodiac Sign: Gemini
Chinese Zodiac Sign: Pig
Blood Type:
Instagram: @nason.official
Youtube: 네이슨 Nason Music

Nason Facts:
– He likes being in the center of the group.
– Although he looks mature he has a boyish charm.
– From all the members he is the best at playing chess.
– He said that being in a mixed-gender group can create this new unique charm and vibe.
– As of November 2020, Nason is believed to have left the group as all references and photos to him have been erased from various media platforms.


Stage Name: Haechang (해창)
Birth Name:
Position: Vocalist, Rapper, Maknae (?)
Zodiac Sign:
Blood Type:

Haechang Facts:
– On November 4, 2020, Haechang was announced as a new member on the agency’s Instagram during a live stream.
– In December 2020 it has been announced that Haechang will stop his activities with CHECKMATE due to personal reasons.

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Made by: jenctzen

(Special thanks to SunJung, Cali Hanna, Jamphii, Mister L, irem, Forever_kpop___, itboydoyum, Andy Dugger, hisa雌犬, Jamphii, Maria McBurrito, bravegirls)

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