Ignis
Encyclopedia Entry:
A fire elemental born from concentrated “fire elements” joined with the “monsters’ magical energy.” They’ve become monsters with a woman’s form. They are monsters that have raging, passionate dispositions, just like a flame. Many of them inhabit places of comparatively high temperatures like volcanic and desert regions.
They form a pact with a man through the act of sexual intercourse. The men who form a covenant with an elemental in this way are called “elementalists.” It is said that they become able to make use of the ignis’ power over fire. Because of their disposition, normally their rough, violent behavior stands out, but they have a burning love for their covenanter, and to him they show another side of themselves as enthusiastic, passionate lovers.