Every time she gives him a huge amount of money he doesn't want, I imagine some village of dirt farmers in abject poverty having a band of taxmen come to their village.
She switches between a tiny girl and a big ass dragon form, why would it be strange to be able to pick a size in between? Excessively limited shapeshifting between two extremes would be weirder.
I'm pretty tired of his attitude, but I guess since his only contact with the kingdom has been the piss witch thus far it probably seems overbearing for them to force him into a party.