Charles's body underwent an uncontrollable evolution, and his appearance became distinctly different from that of an ordinary human.
Two bony horns, like a goat's, rapidly grew from his head.
His body grew taller. Unlike female Succubi, Delis's body was slender—even in a Succubus's battle form.
But Charles, as a male Succubus, was different. His body became stronger and more evenly proportioned.
His skin was tough, taking on the dark red hue of the Abyss. Hard demonic scales grew over vital areas, while sharp bony spurs protruded from the joints of his hands and feet.
His tail was slender and nimble, like a flexible venomous snake, with a sharp spike at its tip. When he whipped it, the spike struck at enemies, no less deadly than a sharp dagger.
The skin on his back tore apart, and a pair of broad, pterosaur-like wings grew from it.
The pain of his skin ripping made Charles grit his teeth and endure. The itching from his growing wings was even worse, giving him the urge to carve that flesh right off.
The newly born wings were still soft and damp, with Charles's blood dripping from them.
Charles sensed the two new appendages that had suddenly appeared on his body: wings and a tail.
At first, he could not control them skillfully, but as time passed, he was already able to consciously direct his tail.
His wings slowly spread open as well. Charles reached out and touched his left wing, feeling the bones within steadily harden.
For now, the membranes of his wings were still soft, like tender new skin. But as time passed and the blood dried, they would become exceedingly tough.
For male Succubi, wings were not merely tools for flight. Sometimes, they could even serve as weapons and shields, blocking ranged attacks.