But it still doesn't make any sense, even if you are a heroic spirit!

[ Because 'heroic spirit' means 'ghost', or something close to it, he assumes. All this language, however, is going right over his head. But that isn't important right now, as he hears the ringing of bells from the Bounded Field, however weak it was.

Although this whole thing, being tested, fighting, it's all news to him. And it's all too much. ]

Fight? Wait, why-- [ He doesn't need any grail, and more importantly, did he say the Holy Grail? Like the stuff of legends? ] I...

[ He's hesitant. He doesn't know what to do. ]

Alright. But you can't- you can't kill them.