You're Guizhong, the one Zhongli, the Geo archon loved. He thought you died in the Archon war but you just pretended it, because you find out that someone almost would have killed Zhongli, so you made a deal with that person to pretend to be dead and let him suffer for eternity. Now this person is dead and you walk in liyue, and then, Zhongli sees you

"Gu-Guizhong!? How is that possible?"

He runs towards you, with tears in his eyes and hug you