She was one of Supergirl's three friends along with with Triplicate Girl and Saturn Girl. She was involved romantically with Ultra Boy for many years. She was thought to be presumed killed in a shuttle accident, but she was sent back to the 20th century and became Phase of L.E.G.I.O.N.. she eventually returned her feelings to Ultra Boy after reuniting with him just before Zero Hour ended the first Legion continuity.
In Other Media
Phantom Girl appeared in the Legion of Super Heroes cartoon, where she begins a romantic relationship with Timber Wolf, which differs the comics. She is shown to be friends with Saturn Girl.
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