Race Tensen Tao Attribute Water Occupation Partial ruler of Kotaku Affiliation Lord Tensen, Xu Fu Ran is a member of Lord Tensen and part ruler of Kotaku. Ran is very loyal to Rien and carries the same view of seeing the Tensens as family. Like all the members of Lord Tensen, Ran has no sympathy for humans and uses them as they see fit. He believes that it is a futile effort for the trespassers to invade the palace and try their hand at opposing the Tensens, showing signs that he views them inferior compared to his family. However, he is not above praising or admiring them if they show impressive skills. Due to specializing in Dō'in, Ran is extremely passionate about the physical work of the body and fighting styles that can only be obtained through diligent training.

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Upon transforming into his Kishikai form, Ran expressed his physicality while attacking Gabimaru and Yuzuriha. He was also up to the challenge of facing the two in their use of ninjutsu in order to strengthen his Dō'in training.

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He is bested in a fight against Gabimaru and Yuzuriha and is killed. Ran slowly dies with his last thoughts about Rien.