A Nice Witch?

There are many different creatures, like Sirens, Witch's/warlocks, humans, and Dragons. Humans are known to love to steal Magic, Sirens are Known to be mindless hunters, Witch's are known to cast evil spells for fun, and dragons are known to be used as a protector like a pet. All creatures despise each other and that keeps them separated.

What if though... A human who does not care for magic, a friendly siren who has their own thoughts, a Witch that uses their magic for good, and a dragon who wants to be independent meet and change this controlled system.