Gordon

You know fairy in folklore often pranked humans, by kidnapping, swapping their children, letting them drown. So more likely you will never see your enemies again.

Look like something that can shoot a fire ball as big as a basketball..

Well lots of magic does involve contracting Fairies since the term also include elemental spirits.

Anyway your mother and father disappear every night because there is a portal to their ship that appears every night. The cat noises and the bed shaking noises are actually them fighting the kraken and other sea monsters.

That's why they always look tired and are always so wet.

A fariy.