Gorgeous, law-abiding member of the Lan Clan. WangJi is outwardly strict, but inwardly soft (loves bunny rabbits, his mom and Wei Wuxian, not in that order). He's also a badass fighter, even on the extremely rare occasions when he's completely plastered.
"Ever since a young age, Lan WangJi had been so prim and proper that it was painful to watch. He had always been solemn and stiff, as if he had never been lively before. He couldn’t let a single grain of sand appear in his eyes, which was why he had never approved of Wei WuXian cultivating the dark path."