Watanabe-no-Tsuna
Watanabe-no-Tsuna is a Saber-class Servant from the Heian-kyou Singularity.
He's best known as one of the Four Heavenly Kings under Minamoto-no-Raikou, and he played a major role in the Mount Ooe oni extermination—a brutal affair where the group got the oni drunk on poisoned alcohol before slaughtering them. During that massacre, Watanabe faced off against Ibaraki-douji, who ended up being the only survivor of the bunch.
Things got personal afterward. Ibaraki eventually came after Watanabe herself, attacking him either at Rashoumon Gate or the bridge of Ichijo Modoribashi (sources disagree on the exact spot). In the confrontation, he managed to sever her right hand, which became one of the most famous details of their clash.
Content compiled by AnimeList.moe from publicly available sources.
