People with potential are always interesting, it's true. A lot of humans have potential...it's part of why I like them so much.

[ Beat. ]

Swear your trust in you? Hmmm...

Does saying 'I trust you', counts?

[ Now that he thinks about it, Merlin does carry a certain amount of trust in Sonya. But, 'swearing' things for a being like himself requires quite a bit more. ]