“…Master Kirei.”

Kirei tensed. A shadow silently came up, next to him. Someone, a woman wearing a skull mask and garbed entirely in black; it was Assassin who was responsible for reconnaissance near the storage street.

“… What is it?”

“Reporting. I have located something strange outside of the church.”

Assassin respectfully handed the corpse of a bat. Though the head has been twisted and broken, it was slightly warm – suggesting it hasn’t died for too long.

“A familiar?”

“Yes. Though it is outside the bounded field, but it is obvious that it was placed there to monitor the church.”

- Fate/Zero: Act 4, Part 4