Dragon Galvatron makes seal noises and whacks his tail about when he's really happy. Neeeeeeeeeeerd.
Seeing as Galvatron is a dragon in TWO AU's so here's a small explanation of the differences In this AU he's a Arctic/Western hybrid dragon. In that he's got aquatic features, webs and fat blubber. Due to the western part of him he's got a bit more spikes and his back fins are now wing-like. He can't fly at all though.