This is love!
Not only are these two of my ultimate favourite fandoms, but the story itself is absolutely wonderful. ^^
Gandalf was being a real ass, and the reference to 'Aslan's lapdog' really makes it clear that he has a certain amount of contempt for the Pevensies and Aslan as well. There is a sort of rivalry there, between wizards and Aslan (which makes me wonder where Tash and Sauron fit into the picture) Gandalf definitely should have some more respect for a king, never mind how old said king is, especially considering it' HIGH king. But yeah, Gandalf's no good with showing respect to people he doesn't see as working for his own cause.
Also, the snark and the banter between the siblings was absolutely marvelous! I adore the interaction and more. I'm just not used to such fabulous interaction between the Pevensie kids and it blows my mind every time.
And Susan/Eomer! *dies happy*