V represents the roman numeral 5, which was V's cell number when
in the prison camp.
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No, V for Vendetta is about Anarchy and Fascism, nothing to do
with Religion whatsoever
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The "V" in "V for Vendetta" refers to the protagonist and anti-hero of the story, V. V is a symbol of resistance against a corrupt government and oppression, embodying the themes of vengeance and vendetta against those in power.