Shuyin, as he appears on FantasyLegendsMUSH. Having allied with the Heartless, he's gained a great deal of power in return for his loyalty to the Darkness. Not, you know, that he didn't pretty much think along those lines to start with.
He ordinarily manifests both wings, not just one (he isn't Sephiroth!) but the wings form out of his coat, so I kinda wanted to show it in transition.