蓝思追, Wen Yuan (温苑), Lan Yuan (蓝愿)
Lan Sizhui is a disciple of the Gusu Lan Sect. Born Wen Yuan Lan Sizhui is the last remaining blood descendant of the nowextinct Qishan Wen Sect. Taken in by Wei Wuxian along with remnants of the Wen clan to the Burial Mounds he lost his home for a second time in the first siege of the Burial Mounds. Discovered by an injured Lan Wangji who came searching for Wei Wuxians remains in the aftermath the thenthreeyearold boy fell into a high fever and lost all memories of his past. He was then renamed as Lan Yuan and later presumably given the courtesy name Sizhui in the same year that Wei Wuxian returned to the living world.