Ser is more formality than Redvers is used to with this lot, and never mind that he'll tell anyone to call him Redvers (or Keen) once the moment arises. Every now and then it's nice not to have it assumed. The default look on his face—friendly-enough amusement—is tempered with a little appreciation.

He knows this face. The name—starts with a C, doesn't it? Or an S?

It'll come to him. Maybe.

In the meantime, he grins over his spoon and has mostly swallowed before he says, "It'd be nice to have a Sister around in any form."