Sunrise, known for mecha series like Gundam, created Code Geass with director Gorō Taniguchi, who later returned to helm the 2019 film "Lelouch of the Resurrection."

The Zero mask in Code Geass was inspired by Japanese Noh theater masks, symbolizing both anonymity and the character's desire to create a world with "zero" oppression.

Lelouch's alter-ego "Zero" symbolizes both mathematical nothingness and infinite potential—a deliberate contradiction that mirrors his dual nature throughout the series.