Teizen Uchiha is the identical brother of Ryo Hyuga. He has the same ocular prowess and jutsus as his brother. The only exception is that Teizen's right eye developed into a Rinnegan while Ryo's left eye developed into a Rinnegan. Along with his twin, he is the progenitor of the Eye of Clairvoyance. He also has the genes of both Senju and Uchiha Clans allowing him the manifestation of the Rinnegan. Along with his brother, he also is a fast learner in the Academy.