Kevin Sydney, known as "Changeling", originally worked for the villainous organization Factor Three.
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He carried various advanced weaponry of alien Siri design belonging to Factor Three, including a ray gun carried in a holster at his side.
The Vanisher eventually regains his memory and joins Factor Three, a subversive organization of mutants who seek world domination.
The O'Reilly Factor | The X Factor (UK) | Microphthalmia-associated transcription factor | The X Factor | Fear Factor | Max Factor | The X Factor (TV series) | B-cell activating factor | Epidermal growth factor receptor | Psi Factor: Chronicles of the Paranormal | Astro Boy: Omega Factor | twist transcription factor | The X Factor (U.S.) | The X Factor (UK TV series) | The X Factor (UK series 2) | The Omega Factor | The Butch Factor | The Adonis Factor | Sp1 transcription factor | Rheumatoid factor | PSI Factor | O'Reilly Factor | Insulin-like growth factor 1 | Factor Three | factor | ETX (form factor) | epidermal growth factor receptor | Britain's Got the Pop Factor... | Vascular endothelial growth factor A | The Vengeance Factor |