"Sure."

If he's a Servant she contracts with sometime in the future, what harm can it do? Obviously he must be an ally she trusts later, after all.

Ritsuka nods at that.

"Right."

Of course, these conversations will probably be a bit... trickier, considering, but at least Ritsuka has the sense not to ask anything too obvious right off the bat. She might be incredibly naive at times, but she's certainly not stupid!