Given the headcanons the Rin-player and I have come up with... Yeah that sounds like Tohsaka Daddy. If you wanted to work the religious angle, he and Kirei could've belonged to the same church as well. The girls are Christian, even if in a more passive way compared to their father.

ROFL now I'm imagining Sakura going to his shop the first time and Kirei being like "Man that was easy, didn't even have to look for her."

And yeah Sakura is a trouble magnet... y'know how it is with these Fate characters and their depressing backgrounds. She will thank the priest doing her a random solid.