Well to gain the power of water Calypso had to train a lot and her teacher helps her with that, and actually her teacher was
Spoiler!
Her mother who taught her how to use the power of water. And in this lifetime Calypso is trying to find her but she doesn't know it was her mother all along
I like to post spoilers for the stories I find interesting because I don't have much time to read novel due to busy schedule
you will find me in most romantic historical manhwa comment sections 
you will find me in most romantic historical manhwa comment sections 
