All kinds of unreasonable things happened in this world.
Why had Emiya Kiritsugu joined the Einzbern Family and become Irisviel's husband?
Because he wanted to participate in the Holy Grail War, because he wanted to use the Holy Grail—the ultimate prize—to realize his [ideal] of saving all humanity.
From the very beginning, Irisviel had merely been a [tool] meant to bind Emiya Kiritsugu, a powerful outside ally, to them.
But things always produced unforeseen complications.
After accepting this arranged marriage, the Mage Killer, always cruel and indifferent, fell in love with this homunculus destined for destruction.
And this homunculus, who would give her life for her husband, also fell in love with the husband destined to kill her.
Their paths in life had been vastly different, yet they still married and still loved each other.
But Emiya Kiritsugu was not someone who would give up his ideals for love.
They were his reason for living, his reason for existing. He had to fulfill this wish.
He had to save humanity.
Irisviel chose to support him—this had been destined from the start. Her very existence was itself a form of "support" for the one she loved.
Moreover, Irisviel was a brave, intelligent woman who understood how to assess the situation and fully cooperate with Emiya Kiritsugu.
Kirei Kotomine's physical abilities were extraordinarily powerful. Neither Maiya Hisau nor Irisviel, not even Emiya Kiritsugu, could match Kirei Kotomine in that regard. Therefore, she could not escape—even if Maiya Hisau helped buy time, she still could not escape. Irisviel understood that clearly.
So, if she could not escape, then she had to fight.
"Miss Maiya, here and now, we'll kill Kirei Kotomine!"
Whoosh!
The strap glowing with a faint blue fluorescence was clearly a Mystic Code. Irisviel swung it through the air, while moving