Sha Gojyo

Sha Gojyo (沙悟浄) is one of the main characters in Saiyuki. He is a hanyou, a cross between a yokai and a human, and uses the Shakugetsujou, a metal weapon staff with a sickle and chain, as his primary weapon. In the anime it is revealed that Gojyo can hold his breath for prolonged periods of time while submerged, possibly an inheritance from his demon father, who may have been a water demon (hence, Gojyo's own nickname as "Kappa").