Tango: Nirik! He got stuck like that. But dont worry, hes not actually alwayd angry.
Lizzie: A seapony! I considered making her a cat person, but i really like seaponies. So i gave her a calico pattern.
Jimmy: Hes half pegasus/donkey, so a mule almost. Unfortunately, donkey blood dilutes the pegasus, so his wings and feathers are too small to fly properly. That doesnt stop him from trying though, he can attain some airtime before his wings are too tired.
Doc: Draconequus, or maybe some sort of chimera species. Does he have some sort of ominous magics? or does he just create machines that make it look like he does? i dunno, the hermits probably dont either.