“Rider, why did you use your own stored prana instead of using mine? It is my duty to provide it. And you made that decision twice in a row without consulting me… just what are you trying to do?”

“As for… that.”

Rider made a deep sigh as if it were difficult to explain.

“Frankly, as a Servant I am purely a killer of souls. If I had involved you when I released all of my prana, it could have threatened your life.”

“Even so – I was prepared.”

- Fate/Zero: Act 13, Part 3