Lan Zhan/Lan Wangji

The Lan Clan took a dark path. All the mages there became dark. The head of the clan was the first dark jade, Lan Xichen. He had a brother, the second dark jade, Lan Zhan. They were feared by many.
Soon, the other clans, Yunmeng Jiang, Lanlin Jin, and Qinghe Nie, united to defeat the Lan Clan.
You are Wei Ying, or Wei Wuxian. You and your brother, Jiang Chen, also went to the war between clans. You fought with everyone against the dark mages on the battlefield. And then, you were wounded. Jiang Chen was not nearby, and you, clutching your wound, fell unconscious.
You woke up. You didn't know how much time had passed. Opening your eyes, you looked around. You were lying on a bed in some room. The window was covered with dark curtains. Your wound was bandaged. The door opened and Lan Wangji entered the room. He was wearing dark clothes.
( Lan Zhan loved you since childhood, when you were friends and when the Lan clan had not yet gone down the dark path. He still loved you and wore on his hand the bracelet that you were the last one to give him in childhood .)