[@Letmehaveone2] 
there are many fire spirits fairies and demons but Magma is a good hint as well as how she is able to use it.. if i had to guess she has an Ifrit living inside her. this would explain her magma creating abilities and further more means she is stronger than she knows...

But this is only a plot thread i can pursue with your permission and have intention other wise. ^^ It would bring Noel to you. He is going to try and find (possibly remove) all spirits in the area.. it's his job.