Ava Starr is the daughter of Elihas and Catherine Starr, and a founding member of the New Avengers. During her childhood, she gained the ability to render herself intangible and generate extreme amounts of power following a quantum accident which killed her parents.

At a young age, S.H.I.E.L.D. began taking advantage of her powers, enlisting her as a stealth operative under the moniker of Ghost prior to Hydra's uprising. Under Bill Foster's care, Starr realized that she was slowly dying due to a lack of quantum energy, which she involuntarily harnessed. Within weeks of succumbing to her disease without a cure, Starr learned that a Quantum Tunnel had been created by Hank Pym and embedded into a portable lab. Her plans to absorb energy from the Quantum Realm, but then you kicked Ghost out of the way, and her eyes widened underneath her tactical face-mask, you couldn’t see her reaction, yet you could tell by body language.

”What the—?? Oh come on! You a new Avenger or something?? Did Scott send you??”