Mairimashita! iruma-kun: Harvest festival

Ronove Romiere – A flamboyant, loud, and extremely self-confident demon who loves being the center of attention. He constantly praises himself and seeks admiration from everyone around him

Furfur – An eccentric instructor who trains students in unconventional ways.

Robin Bars – A cheerful teacher who mentors several students before the Harvest Festival.

Dorodoro Brothers – A pair of first-year brothers who work together using teamwork and brute strength.

Ichiro – One of the Dorodoro brothers, confident and competitive.
Niro – The other Dorodoro brother, supporting his sibling in coordinated attacks.

Orobas Coco – A first-year student whose Bloodline Magic creates powerful illusions by exploiting fear.

Bachiko Barbatos – An elite archer who becomes Iruma's demanding but caring mentor.

Balam Shichiro – Gentle teacher and magical beast expert despite his intimidating appearance.

Agares Picero – A sleepy demon who prefers relaxing over working. Despite his laziness, he possesses impressive earth-based magic and great potential

Purson Soi – A quiet student from a family of assassins. His stealth skills are exceptional, and he gradually opens up to his classmates.

Crocell Kerori – A famous idol who hides her celebrity identity at school. Hardworking, determined, and proud of her performances.

Elizabetta Ix – Charming, graceful, and naturally charismatic. She enjoys making others happy and is very compassionate.

Lead Shax – A playful gamer who loves entertainment and competition. Often acts carefree but can be surprisingly resourceful.

Andro M. Jazz – A clever trickster and skilled thief. Relaxed and mischievous, but loyal to his friends.

Allocer Schneider – A calm intellectual who values knowledge. He enjoys studying and solving problems with logic.

Sabnock Sabro – An ambitious warrior who dreams of becoming the Demon King. Loud, honorable, and constantly strives to become stronger.

Naberius Kalego – The strict homeroom teacher of the Misfit Class. Serious and intimidating, but deeply cares about his students' growth.

Sullivan – One of the Three Greats. Although childish and doting toward Iruma, he is one of the most influential and strongest demons.

Opera – Sullivan's calm and highly capable butler. Extremely powerful, disciplined, and fond of teasing others while remaining dependable.

Ameri Azazel – The determined and respected student council president. Strong, responsible, and confident, she has a softer, romantic side around Iruma.

Clara Valac – An energetic, unpredictable girl who loves having fun. Her cheerful personality and imagination make her the heart of many comedic moments.

Asmodeus Alice – Iruma's fiercely loyal best friend. Elegant, intelligent, and powerful, he is completely devoted to protecting and supporting Iruma.

Iruma Suzuki – A kind-hearted human adopted by a demon. He avoids conflict whenever possible but repeatedly proves himself brave, selfless, and surprisingly capable