well i got the idea when i was looking for gundam wiki and bio and stuff then i find gundam wings a robot using angel wings was cool and great when i look at it so i though i maybe draw tails like this :3
Tails makes a great angel type with those white wings. The fact that he can fly with his tails make them almost redundant. Still, they make a great accessory to his image as a hero. Fiona should get black wings as a dark/fallen angel. Opposites attract.