Wings (OC insert, Asch×OC)

Amaya Pheonix, the older sister of Ava, was tan girl with flame colored hair, tan skin, and striking blue eyes, but the oddest thing about her was the red and gold tattoos on her back, and where she concentrated, the tattoos disappeared and she grew flaming wings, and was utterly unharmed by fire. She and her sister lived happily, but one day, after coming home from her small shop, she found her sister being held captive by five demons. Will she and the fire tempered prince end up killing eachother, or will they come to a understanding, maybe more?