One who masquerades; a person wearing a mask; one disguised.(noun)
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Use "masquerader" in a sentence
"And whenever the masquerader is questioned by someone who is not totally devoid of critical thinking, the storyteller falls back on claims of those questioned details being officially considered ‘sensitive’ or ‘classified’ … and thus unavailable for comment or verification."
"He's a masquerader and anything he signs into law isn't valid."
"The entities that would be fooled by a masquerader are ones that don't really know me: my bank, my credit card company, places where I do online or offline shopping."