Ren egy sámán kínából, egyike a Tao család tagjainak, akik évszázadokon át segítettek az embereknek, és megvédték őket, de később boszorkányoknak, és sartlatánoknak nevezték őket, ezért száműzték őket.
2 évszázada En Tao lett a vezére a Tao klánnak, aki Ren nagybátya (A japán verzióban En nem Ren nagybátya, hanem az apja).
Mindig arra tanította Rent, hogy pusztítson, és gyűlöljön minden embert. De ez a világnézete megváltozott, mikor egyik csatájuk döntetlennel végződött Yoh-val, és barátok lettek. Ekkor jött rá hogy a nagybátya tévedett az emberekkel kapcsolatban.
A nővérével, Junal, és az újjonnan szerzett barátaival legyőzték Ent, és így Ren átvette a vezetést a Tao családban.
Ren védőszelleme egy kínai harcos, Bason, aki legalább annyira erős harcos volt, mint maga Ren. Ren fegyvere a Kwan-Dao.
Charater Description:
Ren is a Shaman from China, one of the few remaining members of the Tao Family, who after their years of serving as the guardians of the Forbidden City, became outcasts and condemned as witches and devils. Those two centuries of suffering were the fuel of the hatred En Tao bared for those outside of their clan and even more for those of the Tao family who associated themselves with outsiders like his brother, Len's father (in the Japanese version, En Tao is Ren's father, not his uncle).
Ren was taught to hate and see the worst in people, with the Tao family Crest magically tattooed on his back by his uncle as a reminder of his "destiny" to be Shaman King so he can punish the world for what it did to the Tao clan. But that all changed when he met and fought Yoh Asakura, whose laid back nature and friends convinced Ren that his uncle was wrong about people.
With his sister Jun and his new-found friends, Ren confronted his uncle En and no longer dwells in his family's shadow. But he now intends to be Shaman King to restore his family's name and honor. Ren's guardian ghost is a Chinese warlord named Bason, whose loyalty know no bounds. Ren's weapon of choice is a Kwan-Dao (looks similar to a spear), which he fuses Bason into during battles.