Uzume OrangeHeart

You forgot to mention the FF14 Tonberries, where they were created by a plague, and only were freed from the madness by defeating their king. They then became kind again, but the harder version of the dungeon you fight the king in (Wanderer's Palace (Hard), naturally) has them enslaved, and when you beat the final boss, they rush in and stab it to make sure it's dead. I love that dungeon so much >w>