I think instead of skirting around the issue they should actually take it straight on the nose and outright parody the whole boob flash thing.
For her ultimate have Orchid turn her back to the camera and appear to be unbuckling her combat bustier, with the other character in a semi-stunned animation look at her as if to say “really now?” Then, as she’s fumbling just before she turns, her opposition looks really shocked as Orchid suddenly whips around to face the camera revealing 2 sizeable hand grenades, (or whatever grenade type it is she uses) casually tossing one at her enemy’s feet, then flik flaks toward her opponent, punches them in the face and wedges the second grenade into their mouth, she back flips to a safe distance while the opposition explodes into light particles, leaving a character-centric item to drop to the floor where they once were.
For her win pose, she turns to the camera, shrugs and says “Told you so.” (Touch me and I’ll break your face) 