Judging by Kariya Matou's reaction after discovering him, Kiritsugu Emiya felt that Kariya Matou had no awareness whatsoever of what it meant to be a participant in the Holy Grail War.
If Kiritsugu Emiya and Kariya Matou had switched places, the moment Kiritsugu realized he had been exposed, he would have immediately used a Command Spell to summon Saber to his side for protection.
But what about Kariya Matou?
After being exposed, he had actually reacted like an ordinary person, showing hardly any wariness toward Kiritsugu's appearance.
If he shot Kariya Matou right now...
The thought flashed through Kiritsugu Emiya's mind.
But Kiritsugu quickly cast that tempting idea aside.
Before defeating that Archer, Berserker's existence was essential.
In this Holy Grail War, aside from Berserker, Kiritsugu had no idea which other Servant could stand against Archer.
Furthermore, Kariya Matou's naive behavior made him the ideal ally in Kiritsugu's eyes.
Once Archer was defeated and Tokiomi Tohsaka was forced out, Kiritsugu felt he could kill Kariya Matou several times over in less than three seconds.
"Don't be nervous, Lord Kariya."
"I mean you no harm."
To show that he truly bore Kariya Matou no ill will, Kiritsugu set the pistol at his waist on the ground in front of Kariya and raised both hands high.
"Who are you?"
Seeing Kiritsugu's actions, Kariya Matou relaxed slightly and asked again.
"Lord Kariya, I am Kiritsugu Emiya, the husband of Saber's Master, Irisviel."
Even at a time like this, Kiritsugu had no intention of revealing his identity.
The black leather gloves he wore, with the fingertips exposed, concealed the Command Spell on the back of his right hand.
"The husband of Saber's Master?"
Kariya Matou looked at Kiritsugu, then at Saber, who was fighting Ailin. Only then did he belatedly take several steps back,