Dainsleif is the former knight captain of the Royal Guard of Khaenri'ah. However, he failed to prevent the destruction of Khaenri'ah 500 years ago. A curse of immortality was placed upon him so that he would forever wander Teyvat. Dainsleif is a tall man with light blonde hair and sea blue eyes with distinct, star-shaped irises that are common among "pure-blood" Khaenri'ahns He wears a mask-like eyepatch covering the right side of his face while still showing his right eye.