"Sylvia Manners was an English society lady who was sent to live an an ancient castle with her aunt in the wake of the London bombings. She acted demure and sickly in public, but when the Nazi agents threatened her homeland, she slipped into the castle's secret underground hangar and flew her plane against the Nazis as Black Angel. Later on, she met Colonel Prince, the RAF air ace known as "Black Prince." The good colonial was infatuated with Black Angel, and Silvia was happy to return his affections (at least while she was in costume). Black Angel battled such enemies as Baroness Blood and the Son of Rasputin. While Black Angel did not have super powers, she was a skilled pilot and fighter. She also used poison darts to take out enemies."
I really liked the idea behind this character, but - as much as I love those adorable little wings on her completely useless 'mask' - I felt like she needed an update. Substitute the Nazis with any other evil power and you've got a perfectly good modern heroine. I gave her a helmet with wing-shaped visor and exchanged her blow darts for a dart-gun, and her plane for a telescopic back-pack glider.