"I could tell, yes..." He glances down at the rapidly freezing puddle forming under them and can't help but chuckle. "Though, I am not familiar with water gensai. I've never met one. I do not know if you are aware of vampires? That is what I am. It's a pleasure to meet you..." wait, Mairi.

So, this is who River told him of. Fire and water, how interesting. River has, as usual, exquisite taste in lovers.

"--Mairi, ah, that name is familiar. Forgive me, River told me that she met you recently and you both bonded rather well."