Fantômas

“Fantômas”
“What did you say?”
“I said: Fantômas.”
“And what does that mean?”
“Nothing … Everything”
“But what is it?”
“No one … And yet, yes, it is someone!”
“And what does this someone do?”
“Spread Terror!!”

(Opening lines of Fantômas, the first novel in the Fantômas series by Pierre Souvestre and Marcel Allain, popular in early twentieth century Paris)