Tandy Bowen aka Dagger from Marvel Comics. This is her in her classic costume, now trained on Illustrious and cleaned up a little. The facial marking still doesn't appear though so I recommend not using it.

Version 2 Triggers: tandyb, blonde hair, long hair, blue eyes, bodysuit, clothing cutout, facial mark, pendant,

Version 1 Triggers: tandybowenillus, blonde hair, long hair, blue eyes, bodysuit, center opening, clothing cutout