Seo Yul is friends with Elris’ Bella.
Seo Yul was the runner-up at the Korean Edition of The Voice Kids.
She represents a raspberry
Her older sister is AOA’s Yuna
Her hobby is singing.
She joined the band in January 2015, after Subin, Iera and Nayeon left the group to focus on their studies.
Seo Yul joined YG's "Mix Nine" and placed 67th.