Do-S

Do-S presents as a shapely woman, though her look is pure fetish theater. Metal rings cinch a set of tight straps into a scanty harness, the bands meeting at two ringed junctions on her torso, one riding above the bust and one circling the navel. Blonde hair falls long past a black bloom pinned by her left temple, a pink heart glows on her brow, and pink irises float in black sclera above rows of ear piercings. Studded leather rings and a bracer wrap the right hand while a perforated glove runs up the left; heeled boots, shredded arm warmers, a studded choker, and a filter mask bearing an S round it out. Strip the mask away and a huge ragged grin of shark teeth appears, trailing a long, wet, rubbery tongue. The anime trims her down, dropping the harness zipper and leaving just one tiny stud per ear.

Her wardrobe advertises her temperament: a haughty, sadistic mistress who lashes foes with her whip and demands instant obedience. Enemies she finds amusing become playthings, as when she batted Fubuki around and floated the idea of using her as bait for Tatsumaki. Wound her badly, though, and the coquettish act evaporates, baring a merciless killer bent on wiping out whoever stands before her. Losing turns her frantic; she rages, grovels toward Sweet Mask, or feeds her own slaves to Tatsumaki to buy an escape. Faced with someone clearly out of her league, such as Orochi, she flips submissive and slippery, spinning excuses to escape the Monster King's wrath. What never fades is her greed for servants: she grabs every opening to conscript whole outfits, from the guns-for-hire under Narinki to the swordsmen apprenticed to Atomic Samurai.

Do-S enters the story in the Monster Association's synchronized assault on the cities, effortlessly cutting down Pandaman, Saturn Man, and Darkness Blade before whipping the fallen heroes into turning on Dynamite Man. The Blizzard Group freezes her puppets in place, and its captain Fubuki catches the whip in midair, opening a long back-and-forth between the two. Do-S gains the upper hand, converts Fubuki's followers into thralls, and finally drives the lash through Fubuki's telekinetic shield, landing several hits. Convinced the hero is hers, she gloats about her scheme to lure out Tatsumaki, only for Fubuki, never truly controlled, to blast her away with Hell Storm. When Tatsumaki's arrival rocks the city, a rattled Do-S hurls her slaves forward as cover and slips off.

Dragged before Orochi for execution back at headquarters, she is spared only because Gyoro Gyoro vouches for her. She then brainwashes the captured mercenaries of Narinki's squad, shields them from Royal Ripper, and sics them on Atomic Samurai's pupils, until Sweet Mask steps in. Smitten, she offers to release the squad for a private moment with him; he declines and pulps her head, her dying realization being that he is no human. Licking up monster blood revives her, and she sets out to reclaim her scattered thralls and claim Sweet Mask as her thousandth. Instead she stumbles onto Fubuki traveling with Bang and Bomb, grabs hostages to stall them, and discovers too late that her foe is the S-Class veteran Silver Fang. Bang flattens both her and her slaves, Fubuki strikes back with Do-S's own whip, and the freed captives revert to human. Pressed for Garou's location, she bluffs with a silent dog whistle that instead rouses the raging Overgrown Rover; as she bolts, a second Hell Storm pitches her into a chasm.

Her signature power is hypnosis: any strike from her spiked whip can brand a victim as a heart-eyed "love slave" sworn to obey, though a strong enough will shrugs it off and a lapse in her focus frees the enthralled. She hits hard enough to send crowds flying and to crack Sweet Mask's eye, endures psychic barrages, and outruns pursuit. Her body stretches at will, her hidden tongue whips out for ambushes, a foot can morph into a serpent's maw, and gulped blood knits her wounds shut. The whistle she carries makes no audible sound yet calls the monstrous Rover to heel.