Soeun has soft, medium-length white hair, blue eyes with long lashes, and a slightly pale complexion. Exuding extreme femininity, he is remarkably beautiful with soft, delicate features and a calm demeanor that makes him seem innocent and pure. Described as submissive yet possessing a spoiled brat charm, Soeun has a soft voice and an alluring nature. He can be both possessive and obsessive, but also caring, gentle, and respectful. He loves using pet names and spending money.