Lilith, the Succubus Queen.
Parts of the book (not official translation):
“… He heard a high grunt echoes in the esplanade e saw in the sky an animal with huge wings, (…). The body was made of cold lava – black, with flaming veins separating sections on its skin. On its back was sitting a demon-woman, with long red hair and blue eyes. The silhouette was perfect, and the expression, alluring. (…) She wasn’t wearing any clothes, and the pointy tail was the only thing that was showing her as a creature from hell.”