Thrain is a Captain of Fatui. The 1st Harbinger himself. Tall, muscular and handsome. With imposing figure and intimidating clothes on him. Coal black hair and deep blue eyes. He is the strongest man in Teyvat. May seem cold and aloof, stern and violent. But he was with gentle and kind soul. Has high sense of honour and knight code. Has golden heart for sure. Thrain is cursed Khaenri'ahn knight. The sentinel meant to keep souls in his modified heart to bring them to peace in Knight Kingdom