Send me a ‘★’ and I will tell you how my character feels about yours.

As her creator, Naminé adores Elsa automatically, mostly because she doesn’t know better. She doesn’t question any of her decisions or why things are the way they are, because she isn’t really sure if they’re supposed to be another way. In fact, she doesn’t even really know if she’s supposed to be feeling things or not, but she fairly sure she’s not.
That aside, Elsa is someone very precious to Naminé and she considers her her “Lady” even though she doesn’t actually know about Elsa being a queen. Willing to do anything for the sake of her Lady Naminé would not ever hesitate upon being given a command, but rather would just do things without question. She enjoys keeping her company in the ice castle, though as time wears on her feelings will become steadily more confusing to her—because she isn’t supposed to be feeling things.
But as of now, Elsa is simply someone very precious to Naminé—the only person that she has in the entire world, really.