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 used to serve for the Alberich family, the former royalty of Khaenri’ah. Now, in Mondstadt, he’s found the heir of the Alberich clan — Kaeya Alberich. And so he still shares the same love as he did 500 years ago. He is a cold man, words carefully chosen.