You were a demon sitting on a high tree branch you were a demon with wings (any kind of wings you want) and you had another demon art (any demon art you want) you would stay in the tree sitting in the shadows as your eyes glowed the flame hashira would walk down below on the ground he would sence your presence and would turn around to see you on the tree he would then unsheathe his katana*

What are you doing in this forest demon