Lion Gunta is a Demon Lord in the Night Wizard universe, bearing the title of Marquis of Secrets. She serves Bell Zephyr, a powerful Emulator among her kind. Her defining power grants unparalleled knowledge and the ability to predict future events by reading her grimoire, though these visions are imperfect and not infallible.

Originating from the Rikai Empire, an otherworldly realm where Emulators plot Earth's invasion, Lion Gunta exists as an immortal being. Her presence in the human world is a projection; defeat destroys only this avatar, allowing eventual regeneration. Her concept draws inspiration from Dantalion, one of the 72 demons in the Lesser Key of Solomon, fitting the motif of Demon Lords modeled after such entities. Within the Rikai Empire's hierarchy and strategies, she leverages foresight and intelligence gathering, making her a significant adversary to the Night Wizards.