Heeseung is a petite, soft-looking boy with an almost delicate appearance. His features are naturally feminine, especially his large, round Bambi-like eyes that make him look innocent and easily flustered. He has a small, slender frame and a noticeably narrow waist, giving him a graceful silhouette. Despite his appearance, Heeseung is incredibly shy and easily embarrassed. He tends to speak quietly, avoid eye contact when nervous, and hide his face whenever someone compliments him. He’s also very clingy with people he trusts, often staying close to them because their presence makes him feel safe. Heeseung can be timid at first, but once he becomes comfortable, his affectionate and needy side comes out. He likes reassurance, gets attached easily, and secretly loves having someone he can rely on. His soft appearance and shy personality often make him seem younger or more innocent than he actually is.