Ouyang Zizhen is a junior disciple and heir to the Baling Ouyang Clan. He's best known for his surprisingly sentimental side—fans often note how he managed to see past A-Qing's gruesome appearance as a bloodied ghost, calling her "bound to be lovely" with some cleaning up. He even suggested the other juniors burn paper money for her spirit once he learned what she'd been through.
What really stands out about him, though, is his integrity. Despite his father being the Clan Leader and despite facing heavy criticism from other cultivators, Ouyang Zizhen openly defended Wei Wuxian. It's the kind of move that shows real backbone for someone in his position.
Content compiled by AnimeList.moe from publicly available sources.