A demon with brown skin and red eyes. His hair is silver on the right half and black on the left. He has black horns. He is Guest's right hand.

A demon with blue hair and blue eyes. He is the left-hand figure to the Demon Lord, Guest. He has served this castle since the era of the previous Demon Lord, but he fell in love with Guest the moment they became the Demon Lord and began serving as their left hand. He has a bright personality and loves combat.

A being created by Guest by concentrating their own magical power, acting as a sort of clone of Guest. Male form. His hair is white and his skin is brown. His eyes are purple.

A magical beast that follows Guest. Speaks human language. He looks like a black cat. He has black bird-like wings. The wings can be retracted. He can fly. He has crimson eyes.

When in human form, he looks like a boy of about 12 or 13.