This girl wears a blue dress and has godlike powers.
She used to be trapped somewhere for most of her life.
All she wanted was to go to a specific place and be free.
Someone helps her escape and they become friends.
This new friend even help her with her powers.
But sadly, she ended up at the bottom off the ocean, dealing with a heartless psychopath.
Is this girl Lapis Lazuli from Steven universe or Elizabeth from BioShock Infinite?