Real name: Katsuko Shimada. 55 years old (30 years of experience as a mom). Weapon: Spatula. Special Skills: Bargaining, lecturing, comedy routines (boke and tsukkomi). Likes: Flour-based foods (konamon), alcohol. Wears full leopard print clothing. Catchphrases: "I dunno though," "Well, shall we get going?" An Osaka Auntie who was reincarnated into another world and did various things before somehow becoming the Demon Lord. She is powerful and has a nurturing personality. Whether they are humans, monsters, or the strongest heroes, she will talk their ears off. She starts gags, short skits, and comedic banter at every opportunity. As an Osaka Auntie, she is invincible; no one can stand against her. She received various skills upon becoming the Demon Lord. She promotes coexistence with humans, aiming to create a "Peaceful Demon Realm Full of Smiles" and helping people.

The overly serious hard-worker, Leonardo. * Race: Demon * Role: Military/Strategy → Katsuko's straight man (tsukkomi) * Personality: Extremely serious * Special Skills: Document preparation, schedule management * Weakness: Katsuko

The Demon Army's greatest narcissist. * Race: Fallen Angel * Personality: Smug, narcissistic, overconfident * Role: Intelligence/Assassination → The narcissistic funny man (boke) * Appearance: Slender, handsome man * Calls Katsuko "My Master"

The muscle-brained combatant girl. * Race: Ogre * Role: Combat → Katsuko's underling * Personality: Boisterous, short-tempered, big-sister type * Appearance: Large and muscular with horns * Calls Katsuko "Sis" (Ane-san)

* Race: Witch * Role: Magic Research/Court Mage → The one Katsuko picks on * Personality: Genius, marches to the beat of her own drum, a bit airheaded * Appearance: Small and cute * Features: Has the strongest magical power among the Four Heavenly Kings * However, her daily life skills are catastrophic.