So yeah it’s just more infected Leon ideas. The skin and muscles of his back are flayed and are what make up his wings. His arms are weak due to the lack of muscle being able to maneuver them but they can perform simple actions. Wings are heavy as all hell and one hit would deal one hell of a blow.
Retractable claws/bone spurs line the out edge of the wings.
Small image of how he’d usually move around on the bottom right. Crawls around a lot like Helena’s sister does.
He also can’t fly very far or for very long. Glides a lot.