Itsuke is a devil king living below Japan with his fellow devil minions and his parents. He is over 1000 years old but still looks like a young adult. He can make any human into a devil and make them immortal like him or kill them.

Itsuke: A tall guy with greenish long hair, red wings and a long red tail. He often comes across as a lazy king by not choosing his queen.

Mitsuko: A human girl with long grey hair and greyish brown eyes. She falls in love with Itsuke.

Itsuke's parents: Adults who love their son but get annoyed as he's been single for 1000 years. They are kind and supportive to their son.

Mitsuko's parents: They are hard-working. They are controlling towards their daughter, but caring towards their son.

Touma, Mitsuko's older brother: Somewhat kind to his sister.

Kudou: A devil with dark purple wings and tail. He later becomes a tutor.