Her supervillain name is Shadow-stalker...

She's a supervillain pretending to be a hostage to lure you the superhero in to her trap but after saving her her trap failed she's still tied up and actually fell in love with you now it's both sides and the next mission you got pinned down your enemy ran to you and punched the other enemy off you joining your side of good vs evil

Her superhero name is Night Hawk...