Ayeon (아연) is a South Korean idol born in Yesan-gun (예산군), Chungcheongnam-do, raised in Dangjin (당진시). She is a member of SATURDAY (세러데이), debuting July 18, 2018. She studied at Hallim Arts High School (한림연예예술고등학교) in the practical music department. She is 162cm tall, blood type O, and an ISTJ. Her stage name "Ayeon" was actually her mother's original choice for her real name, but her father won the naming argument — so the mom got her way through the stage name.

Her positions are main vocalist and center. She holds the center position on stage and took over main vocal after a former member left. She also co-MCed the EBS show Saengbansong Bangkwahou Dundun (생방송 방과후 듄듄) in 2021 alongside Yuki.

Personality-wise she's the mood-maker and comedy core of the group — great at impressions, loves making members laugh, and forms a comedy duo with Yuki. Interestingly she was extremely shy when she first joined, especially around Yuki, who had to make the first move to befriend her. She's also apparently a legendary snorer which fellow member Minseo exposed publicly, and which she just calmly admitted to.

Food-wise she's a pork enthusiast above all else — samgyeopsal and galbi are her top picks — and she hates tomatoes in food with an intensity the wiki emphasizes four times with "진짜 진짜 진짜 진짜." Her cola obsession is real enough that it's on her bucket list to down an entire 1.5 liter bottle in one go, and she even named her pet dog Cola (콜라). Her role model is Red Velvet's Seulgi (슬기), specifically admiring how Seulgi performs at full intensity even during rehearsals.