Lan Jiachen is the elder brother of the Lan siblings. He is devoted to his sick sister, kowtowing until blood streamed while begging Daoist priests for help. Yun Yan saves Lan Jiayin, and in return, Lan Jiachen agrees to impersonate Yan Han as part of a deception plan. He is straightforward, grateful, and vows to see the plan through. His gender is male.
