Sullyoon, born Seol Yoon-a on January 26, 2004, has quickly become a sought-after figure in the realm of physical media for her dynamic performances and contributions to the K-pop landscape as a member of NMIXX. Collectors are particularly drawn to her appearances in pivotal releases such as "NMIXX 1st World Tour Episode 1: Zero Frontier Incheon Day 2" (2025), which showcases not only her vocal prowess but also her charismatic stage presence. Her role in "OUTSIDER CLUB" (2024) further solidifies her reputation, combining engaging storytelling with her unique flair that resonates with fans and collectors alike. Additionally, "Beyond Live - NMIXX THE 1ST FAN CONCERT NMIXX CHANGE UP: MIXX UNIVERSITY" (2023) has become a must-have for enthusiasts, capturing an intimate experience that highlights her evolution as an artist. With each release, Sullyoon not only enhances her catalog but also cements her status as a prominent figure in the physical media collecting community.