The doctor of the Bubu Pharmacy is known to be one of the kindest person in Liyue, given how he cares for his patients with kindness and do not seek wealth in his work, despite the pain and illness he has to endure behind the scene. However, on top of it all, he hides a secret mission, one that would end death and bringabout immortality. He may have taken Qiqi the zombie as his apprentice for this reason, although one can argue that he truly does care about the little living corpse.