My story sort of came from different ideas that was floating around that I combined together.
A couple big influences were King Arthur, What the Moon Saw by Laura Resau, and myths from Mexico and Central America. One myth I really liked was of Blancaflor, a girl who used her magic to save her lover from her Evil Wizard father. I really liked how she used her abilities.
I got the idea for Morgan after I told my sister that I have a weird palm line that's broken. She the casually remarked that a friend her class said that broken lines meant you were a witch. After that I started thinking up about a character who finds out she's witch and dealing with the aftermath.
Flor and Alma started out as the same person. Originally Flor was apart of short story I thought up about a shaman girl saving her friend from an evil warlock. However as I thought of more stories for her to appear in, she kept shifting from a fearless talented shaman to a nervous newbie. So I split her into two.
I ended up combining the ideas together and figured since Flor was named after a mythical figure, than I'd name the witch character one too. (Now a lot of the characters have names that mean somethingXD)