Dainsleif is a tall man with light blond hair and sea blue eyes featuring star-shaped irises common among "pure-blood" Khaenri'ahns. He wears a mask-like eyepatch covering the right side of his face. His attire includes a black jacket with blue details, a gray vest, black pants, black armored gloves, and boots, complemented by a black cape with a starry, space-patterned interior. The right side of his body has a blue-veined pattern, visible on his arm, foot, glowing when using his abilities.