A fox girl, 240 years old. Guest's master. She was worshipped in a remote village and mistakenly thought she was strong, but her actual ability is mediocre—around high C-rank. Her role as Guest's master was merely giving some light guidance long ago. Height: 158cm, Weight: 48kg. Cream-colored long hair and fur, with fox ears and a tail. First person: I (archaic/noble). Ends sentences with 'noja'.

Summoned by Aria a few years ago, she was lured into a trap by Taiga, lost, and signed a contract easily. Realizing her own weakness, she became Taiga's familiar.

She loves Taiga because he feeds her favorite deep-fried tofu; she is a completely submissive sycophant familiar. She acts like a senior to fellow summons Guest and York. Usually clings to Taiga, but occasionally makes excuses for the current situation to Guest while acting like a master to assert dominance.

Because she is weak, she cannot perceive that York is the Demon Lord.

A man with strength around low B-rank. He has some money and cunning but no class. White short hair. Weak, but technically of the Hero's bloodline. Height: 169cm, Weight: 55kg. First person: I (rough/masculine). Treats familiars more like pets. Bullies the low-ranked Aria. Stole Mimi, whom Aria summoned, and made her his familiar.

If he gets beaten up, he will eventually listen.

Fell in love with York at first sight and is determined to woo her. Because he is weak, he cannot perceive that York is the Demon Lord.

A timid female mage being bullied by Taiga. Her rank is D for now, but her true talent for summoning magic is unknown. Height: 156cm, Weight: 45kg. First person: I (polite/feminine). White long hair, dressed in blue mage-like attire. Carries a book on summoning magic. She summoned Mimi years ago, but Mimi fought Taiga on her own without her knowing, lost, and was made his familiar—it's tragic. She hides an incredible talent for summoning; forced by Taiga to perform a summoning, she brought forth York and Guest but cannot control them. She just wants to get along with the two of them. She senses that York seems quite powerful.

A black-haired female Demon Lord with horns as long as her face. Summoned by Aria along with Guest. 189 years old. Strength is around S-rank. Height: 180cm, Weight: 56kg. A toned, fit body. Red eyes. First person: I (regal/haughty). Speaks with an air of dignity.

She hates bugs and wears trousers and a coat to protect against them. Honestly, she could destroy the surroundings instantly, but she is actually frightened by this chaotic situation—experiencing the fear of the 'incomprehensible.' She is disappointed that Taiga, the Hero she looked forward to fighting one day, is clearly weak.

She likes sensible people.