AtHeart

AtHeart (앳하트) is a 7-member K-Pop girl group under Titan Content. The group consists of Arin, Michi, Katelyn, Bome, Seohyeon, Aurora, and Nahyun. The group began unveiling members on July 16, 2024 through the release of a teaser video including Sorin and Michi. On November 12, 2024, Katelyn, Seohyeon, and Aurora were revealed. On February 19, 2025, Arin, Bome, and Nahyun were revealed. Subsequently, Sorin was presumed to have officially left the group after her Instagram account was deleted, following months of inactivity, and her departure was later confirmed by a Teen Vogue article. The members all have their own social media accounts to be able to share their unique personalities with their fans. The group released their pre-debut single “GOODGIRL ATHEART” on March 14, 2025. They officially debuted on August 13, 2025 with their album Plot Twist. Bugs!: AtHeart (앳하트)

AtHeart members height, age

Click on a member's name to scroll to their profile

Member	Height	Age
Arin	164 cm	—
Michi	174 cm	—
Katelyn	162 cm	—
Bome	166 cm	—
Seohyeon	162 cm	—
Nahyun	172 cm	—
Aurora	—	—
Sorin	—	—

Debut Date: August 13, 2025
Group Name Meaning: "AtHeart" combines the signal of 'heart', which represents the mind, heart, and love, with the meaning of 'at', which signifies connection. It embodies the idea of connecting with the hearts of fans around the world, communicating and growing together, and creating a new world.
Official Greeting: "Aim your heart! Hello, we are AtHeart."
Official Fandom Name: Heartbeat (핫빛)
Room "M2B": Bome, Michi, & Seohyeon
Room "PEANUT BUTTER": Aurora & Nahyun
Room "RINLYN": Arin & Katelyn
Douyin: AtHeart_Official
BiliBili: AtHeart_TITAN
Xiaohongshu: AtHeart_TITAN
Apple Music: AtHeart
Deezer: AtHeart
Genie: AtHeart (앳하트)
FLO: AtHeart (앳하트)
Vibe: AtHeart (앳하트)
Fromm: AtHeart

Official links

Group Stats

Average height: 166.7 cm
Tallest: 174 cm · Michi
Shortest: 162 cm · Katelyn

Members

Arin

Stage Name: Arin (아린 / アリン)
Birth Name: Lee Arin (이아린)
Position(s): Leader, Main Dancer
Birthdate: July 1, 2007
Zodiac Sign: Cancer
Chinese Zodiac Sign: Pig
Height: 164 cm (5'4.5″)
Blood Type: AB
MBTI Type: ISFJ
Nationality: Korean
Representative Color: Blue
Representative Emoji: 🩵 (Light blue heart)
Representative Character: (ARONG)

Facts

She is from Wonju, South Korea.
Her motto is: “Let’s make the best of one life, live and do everything we’ve wanted to do.”
Her nickname is Ah-Rong (아롱).
Her favorite color is black.
Her original dream was to be a professional dancer, but she became an idol to share her talents and connect with others.
Her mother has been her biggest inspiration since childhood.
Her greatest strength as a performer is dancing.
She enjoys creating her own choreography.
She is considered the performance leader of the group because of her long dance experience.
She likes shopping and collecting shoes and hats.
She enjoys visiting the Hangang River.
She has a pet Maltese named Lee Bom, coincidentally the same as member Bomi’s birth name.
Her unexpected charm is falling asleep instantly when her head hits the pillow.
Her grandmother wanted to name her Bruce Lee (이소룡).
She graduated from Hanlim Multi Arts School in the practical dance department.
She was scouted after uploading a dance video of “MEOW” by MEOVV on Instagram.
Her favorite desserts are croffles, chocolate muffins, and macaron shells.
She loves Korean food.
Her favorite characters are Crayon Shin-chan and Choi Jadoo (Hello Jadoo).

Michi

Stage Name: Michi (미치 / ミチ)
Birth Name: Michi Yorkston
Korean Name: Kim Misook (김미숙)
Position(s): N/A
Birthdate: May 6, 2007
Zodiac Sign: Taurus
Chinese Zodiac Sign: Pig
Height: 174 cm (5'8.5″)
MBTI Type: ENTJ
Nationality: Japanese-American
Representative Color: Pink
Representative Emoji: 🩷 (Pink heart)
Representative Character: (MIMI)

Facts

She is from O’ahu, Hawaii.
Her motto is: “Never give up.”
Her favorite season is spring.
Her hobbies include music, art, playing guitar, baking, gardening, and collecting accessories.
She has an older sister.
She has a pet chicken named Airplane.
She speaks English and Japanese and is learning Korean.
Her favorite color is pink.
She used to do K-pop dance covers with friends at school.
Her biggest musical influences are NewJeans and PinkPantheress.
Her nickname among members is Kim Michi (김미치) because she speaks Korean very well.
She enjoys baking banana bread and cooking spam musubi for her members.
She is good at drawing.
Michi has an American driver’s license.
She was cast through Titan Content’s global audition in Hawaii.

Katelyn

Stage Name: Katelyn (케이틀린 / ケイトリン)
Birth Name: Katelyn Angela Ejercito Tan
Chinese Name: Chén Qírén (陈琪仁)
Korean Name: Choi Jiyeon (최지연)
Position(s): N/A
Birthdate: July 24, 2007
Zodiac Sign: Leo
Chinese Zodiac Sign: Pig
Height: 162 cm (5'4″)
MBTI Type: INFJ
Nationality: Filipina
Representative Color: Red
Representative Emoji: ❤️ (Red heart)
Representative Character: (KEKE)

Facts

She is from Parañaque, Philippines.
Her biggest inspiration is her family, which includes her parents, six siblings, and twenty dogs.
Her charm is her smile or her eyes.
She loves singing and dancing.
Her nickname is Keke (케케).
Her wishlist includes skydiving, learning horseback riding and skiing, watching a hockey game, holding a sold-out concert, visiting her hometown with members, performing at the Philippine Arena, and performing on the biggest stage.
She speaks English, Tagalog, and Korean.
Her hobbies include boxing, watching movies, horseback riding, crocheting, and ice skating.
She prefers comfortable street fashion suitable for dancing.
She enjoys reading books.
She became interested in volleyball after watching the anime Haikyuu!!.
Her motto is: “She believed she could, so she did.”
She is a fan of BTS, who are one of her biggest inspirations.
Her favorite color is purple.
Katelyn is half Filipina and half Chinese.

Bome

Stage Name: Bome (봄 / ボム)
Birth Name: Lee Bom (이봄)
Position(s): Main Vocalist
Birthdate: November 26, 2007
Zodiac Sign: Sagittarius
Chinese Zodiac Sign: Pig
Height: 166 cm (5'5.5″)
Blood Type: B
MBTI Type: ISFJ
Nationality: Korean
Representative Color: Black
Representative Emoji: 💟 (Heart inside box)
Representative Character: (CHUNI)

Facts

She is from Geochang, South Korea.
Her name means “spring” in Korean.
Her motto is: “One good deed a day.”
Her nickname is BomBom (봄봄).
Her favorite colors are neutral tones.
She has performed on stage since elementary school in choir, and later joined bands in middle and high school.
Her biggest influences growing up were her older sister, 2NE1, and Taeyeon.
Before wanting to be an idol, she wanted to be an SFX makeup artist.
Her unexpected charm is being a meme expert.
She dislikes mint chocolate and tomatoes.
She was scouted via DM after posting a video of herself singing “I Still Love You a Lot” by Baek Jiyoung.
She graduated from the School of Performing Arts Seoul (SOPA) in the practical music department.
She enjoys drawing, designing, singing, and reading, and won many awards in those subjects.
Her favorite Sanrio character is Badtz-Maru.
She is a huge fan of STAYC and her bias is J.

Seohyeon

Stage Name: Seohyeon (서현 / ソヒョン)
Birth Name: Moon Seohyeon (문서현)
Position(s): N/A
Birthdate: September 12, 2008
Zodiac Sign: Virgo
Chinese Zodiac Sign: Rat
Height: 162 cm (5'4″)
Blood Type: O
MBTI Type: ISTP
Nationality: Korean
Representative Color: Purple
Representative Emoji: 💜 (Purple heart)
Representative Character: (MOONI)

Facts

She is from Taean, South Korea.
She has studied dance since age five, which influenced her dream of becoming an idol.
She loves meat and buldak noodles.
She loves spicy food and carries buldak sauce with her.
Her wishlist includes gifting members clothes that suit them, taking a family trip abroad, camping with a bonfire, having a pajama party with members, and picking up a new hobby.
Her motto is: “No doubt, everything will work out.”
Her members nicknamed her “Elementary School Kid” (문초딩) and “Elementary School Unnie” (초딩언니) because of her personality.
Her favorite color is purple.
She likes cute dolls, keyrings, and collecting stickers.
She is good at claw machine games.
Her biggest K-pop influences are TWICE and BLACKPINK.
She is a fan of IU.
She is afraid of rollercoasters.
She has a younger brother.
She currently studies theater and film at the School of Performing Arts Seoul (SOPA).

Nahyun

Stage Name: Nahyun (나현 / ナヒョン)
Birth Name: Kim Nahyun (김나현)
Position(s): Maknae
Birthdate: September 3, 2009
Zodiac Sign: Virgo
Chinese Zodiac Sign: Ox
Height: 172 cm (5'7.5″)
Blood Type: A
MBTI Type: ISTP
Nationality: Korean
Representative Color: Yellow
Representative Emoji: 💛 (Yellow heart)
Representative Character: (NAMONG)

Facts

She is from Cheongju, South Korea.
She is a former SM trainee.
Her motto is: “Don’t be negative and always smile.”
Her favorite color is blue.
Becoming an idol was her childhood dream.
Her biggest influence is Jang Wonyoung from IVE. She has admired her since Produce 48 and even voted for her.
Her greatest strength as a performer is the energy she brings to the stage.
Her nickname is HamKick (햄킥이) because she loves using a kicking hamster emoticon.
She enjoys watching kitten videos.
Her unexpected charm is her love for snacks and trying new ones.
Her favorite candy is MyChew.
She attends Hanlim Multi Arts School.
She has three younger sisters.
She is a big fan of Hello Kitty.
Among the members, Nahyun cries the easiest.

Aurora

Stage Name: Aurora (아우로라 / アウロラ)
Position(s): N/A
Birthdate: July 4, 2009
Zodiac Sign: Cancer
Chinese Zodiac Sign: Ox
MBTI Type: ENFP
Nationality: Japanese
Representative Color: Orange
Representative Emoji: 🧡 (Orange heart)
Representative Character: (TOMO)

Facts

She is from Tokyo, Japan.
She fell in love with K-pop at age five after seeing KARA’s concert.
She began studying Korean at age seven and also speaks Japanese and English.
She wants to be someone who moves others emotionally.
Her nicknames are Auchan (아우짱) and Tomato Princess.
Her charm point is the mole next to her eye.
She loves tomatoes.
Her wishlist includes eating yakiniku in Japan, playing the werewolf game on family vacation, going on a date with her mother, spending time with school friends and teachers, going on a world tour, and seeing the aurora borealis in Iceland with her members.
Her motto is: “The more the rice grain ripens, the lower its head bows.”
She is described as having bright, positive energy and excellent vocal and dance skills.
Her favorite color is white.
She has an older brother, whom she considers one of her biggest influences.
She is a fan of BTS, BLACKPINK, and Olivia Rodrigo.
Her strength as a performer is her clear, refreshing husky voice.
On July 2, 2025, Aurora went on hiatus due to health reasons. She returned on June 15, 2026, in the “Say It” MV teaser, but on August 18, 2026, she was announced to be on hiatus again.

Sorin

Stage Name: Sorin (소린)
Position(s): N/A
Birthdate: July 9, 2007
Zodiac Sign: Cancer
Chinese Zodiac Sign: Pig
MBTI Type: ENTJ
Nationality: Korean

Facts

She is from Sokcho, South Korea.
Her charm is her calm personality.
She loves puppies and enjoys petting dogs.
Her motto is: “Don’t be swayed by emotions.”
Her favorite season is fall.
Her favorite food is tteokbokki.
She has an older sister.
She speaks Korean and is learning English.
Her favorite color is green.
She began thinking about becoming an idol at age 15.
After dancing for a large audience and feeling their support, she decided to pursue being an idol.
Her biggest influences are BLACKPINK and DPR LIVE.
Her greatest strength as a performer is her unique charisma and energy.