How come sometimes it seemed to have all kind of supernatural powers (summoning storms, granting immortality, turning into a small turtle, etc.) but other times it was just a giant turtle that couldn't take a harpoon line off its shell?
Was it all one turtle? Or do they just lay eggs and Magnus bonded with that specific one?
What exactly was Jennie’s deal with it? What does a sea monster need a human companion for? And why did it allow her to romance Magnus?
Apparently she lured men to drowning, like a Siren.
Romancing Magnus might be a way for her to endure her existence.