Sorry, Mikasa, they are on a strange wavelength sometimes. Weird clay is weird.

"You mean Chaldea? Yes. But not all servants come from Chaldea. It is the place where our master has summoned us. For instance, Cu comes from a different time and place than I do. And Iskandar as well. We are all tied to the tales and stories that have shaped humanity."

And they get summoned by mages to fight Holy Grail wars.

"Hmmm, that is a good question. But I take it that if it has a mouth, it also has ears to hear."