Sunset Bain is an underworld armorer who supplies sophisticated weaponry to an elite clientele of master criminals, terrorists, and revolutionaries.

While Baintronic maintained a spotless reputation, Sunset assumed the Madame Menace persona and sold high-tech weaponry to criminals via "a tremendously profitable underground seasonal "Sharper Villain" catalog of armaments.

"[1] When Machine Man lost an arm while fighting Baron Brimstone and the Satan Squad, Madame Menace bought it, obtaining a low price by threatening the seller "with one of her flesh-eating roaches.

Despite her electromagnets and sonic disrupter cannon, Machine Man prevailed, and Sunset had to blow up her yacht to escape.

Madame Menace then made a few minor appearances supplying weapons to Ghost Rider villain Orb,[4] and then Doctor Octopus.

Stark changed into Iron Man and brought the damaged androids to Baintronics, where under the guise of assistance, Sunset created knockoff duplicates of the robots.

[volume & issue needed] After this, Sunset as Madame Menace teamed with the New Enforcers in their plot to take over the fallen Kingpin's crime cartel Ostensibly, Bain did this in order to study the New Enforcers technology, including Dragon Man, Dreadnought and the Super-Adaptoid.

After Iron Man defeated Fin Fang Foom, Baintronics took the contract for transporting the beast's massive bulk.

[11] During the "Opening Salvo" part of the "Secret Empire" storyline, Sunset Bain in her Madame Menace attire was recruited by Baron Helmut Zemo to join the Army of Evil.

Machinesmith shows Machine Man and Quasimodo the news that Arno Stark and Sunset Bain are using Baintronics to acquire a robotics factory and destroy it to avoid the A.I.

[16] During Machine Man's confrontation with X-52 and Jocasta, it was mentioned by X-52 that Sunset Bain is no longer operating as Madame Menace.

[19] Sunset is a genius-level inventor; she controls the resources of Baintronics and other smaller companies, as well as a small army of uniformed criminal hirelings.

finds that Dr. Shapiro is the real mole and not as dumb as she thought as an Iron Legion states that their security system is down.

As Rescue leads the attack on Stark Unlimited, Jocasta downloads the same protection program used on her into the Sunset Bain A.I.

[19] In Washington DC sometime after Tony and Arno thwarted the Extinction Entity, Chairman Brickman is informed by the Sunset Bain A.I.

At the Uncanny Valley Robot Bar, Machine Man and Jocasta were shown to have controlled the Sunset Bain A.I.

She was still the head of Baintronics, which had leveraged the tech from Machine Man and Jocasta in order to become the predominant megacorporation of its day.