History
After a botched experiment involving the Quantum Realm killed Ava Starr's parents, she was left an orphan and soon discovered that the accident granted her the ability to become intangible. She was taken in by S.H.I.E.L.D., whose scientists built her an advanced containment suit -- the "Ghost Suit" -- that allowed her to switch between solid and intangible forms at will. Along with her quantum mutation that allows her to phase through solid objects and become invisible, Ghost is also a master spy and deadly assassin.[1]