The wings are separate objects; I used Lock & Key to "lock" them to unactivated bones within the girl's back. Making the wings separate objects gave me greater control over the Cel-Look Edges ink colors used for each object (black for the girl; white for the wings). I chose Cel-Look Edges over Fast Fresnel inking (or its Super Cel Shader 2.01 counterpart: Bump Edges) because I wanted a line of even width.

 I used SuperGlow to generate the single-color edge glow, creating a "halo" effect similar to the ones used in Escaflowne.