Deception and Identity

Characters frequently adopt disguises, false names, and hidden agendas—Lupin as Dr. Vernes, Clarisse's secret past, and the hidden identity of Gilbert—underscoring the theme of illusion versus reality.

Lupin's false identity as a rescuer and his escape demonstrate the theme of deception.

Lupin uses the alias Michel Beaumont; Daubrecq detects Lupin's hidden presence.

Lupin and Victoire assume false identities to infiltrate Daubrecq's home, and the mysterious woman conceals her true intentions and identity.

Lupin disguises himself as a retired tradesman; the child's identity as the 'chief of the enemies' is a deception.