[Sasame stands next to Elsa and smiles warmly at her. He can see that she was startled by his presence, so he tries to be reassuring that everything is all right.]

No need to be sorry. I should be the one apologizing to you, I can see by your face that I startled you. I hope you'll forgive me, I mean you no harm.

[But he does answer her question after that.]

Well there's technically only two. As I said, not many can do it and it's quite surprising to see another who can control the elements.