Star is not technically a furry, just like the animals in Zootopia aren't furries, they're anthros. She has digigrade legs, that's why they're bent, they're animalistic.
Archaes like Star can live and die over an over again, letting them living a long time. She actually evolved to walk upright from a hunched raptor stance due to her affinity for human-like weapons and working with humans for so long, though, she still has the bent legs.
Her magic elements are Ice and Wind. She can actually shake her wings and cause glands under her feathers to let out a chemical that rapidly freezes carbon-based life forms on contact, though, start is immune to her own glands and their chemicals.