Why does Black Saber hate Shiro?

For the appearance of the black saber, in the face of the chance to win the Holy Grail again, Altoria finally chose to accept that she was dyed black. Compared with the noble King Arthur, the blackened King Arthur believes that the ideal can be realized, even tyranny is a feasible means. For the sake of one's old country, accepting the blackened self and winning the Holy Grail even if it is an enemy of the world, has become the goal of the Black Saber.

It was Altoria himself who led Shiro out of the fight and started a battle with Saber. Black Saber said to Shi Lang, "Without me, we can save KINOMOTO SAKURA." This is also the guidance of Altoria, and Shi Lang is determined to fight with her.

Related introduction:

Saber alternative, who lost to Hassan Saba on the HF route, was swallowed up by the shadow and got a body named saber alternative.

The dark Altoria, supplied by the expanding magic in blackened cherry blossoms, can release the "Excalibur" indefinitely. So you can confront Hercules and overwhelm him. Known as the strongest servant in set CM3.