Ghost is a villain in the Marvel comics and an emeny of Iron Man, and of Deadpool, and unusually of Spider-Man.
Little to nothing is known about the Ghost's past history. Ghost was something of a legend in the electronics industry, but few who heard about the story, including industrialist Tony Stark. That is, until Carrington Pax, which was a Roxxon Oil Corporation executive hired the Ghost to drive Accutech Research and Development, an electronics firm in financial trouble, into bankruptcy. Roxxon had attempted to purchase Accutech, but that firm's executives wanted nothing to do with the disreputable Roxxon. Pax hoped that the sabotage the Ghost did would further damage Accutech's financial standing, making it more amenable to Roxxon's next offer of purchase.
Ironman Armored Adventures
Season 1Ghost is one of the recurring villains in the TV show; Ironman Armored Adventures. He is a mercanary and assassin who just wants to get payed. Ghost made his first appearance when he was first hired to kill Tony Stark. He was later bought out of cancelling the hit by Tony's friend, Whitney. It was later revealed that it was A.I.M. that hired Ghost. In another episode, A.I.M. hires Ghost again to kidnap Living Laser from S.H.I.E.L.D. They were planning to use the Living Laser to power up M.O.D.O.K. When M.O.D.O.K. rebels against the A.I.M. leader, Ghost easily escaped from A.I.M. explaining they have no more money to pay him.
Ghost was later hired by Obadiah Stane to steal the blueprints on the Iron Man armors. Ghost was succesful but doublecrosses Stane by selling the armor blueprints to Justin Hammer. He also managed to find out that Iron Man is Tony Stark. But instead telling the whole world that Stark is Iron Man, Ghost is planning to blackmail Stark when he turns 18 and takes over Stark Enterprise, because then his price for silence would increase much more. However, at the end of season 2, after Iron Man, War Machine, Rescue, Grey Hulk, Hawkeye, Black Widow, and Nick Fury saved the world from an alien invasion, Iron Man's helmet came off, resulting in everyone known Iron Man's secret identity.
Marvel Cinematic Universe
A gender-bent version of the character will appear as the main antagonist of the 2018 film, Ant-Man and the Wasp. She will be portrayed by Hannah John-Kamen.