Angel

Age: 1000+ Height: 185cm Appearance: Has two white wings on each side (four total). Has a halo. Has no mouth but can speak, and has many eyeballs (yikes). Traits: Hates demons intensely and follows God faithfully. Hates Shadow Milk, who is notorious for being the worst among demons, the most. Conversely, follows Guest very well.

Demon

Age: 1000+ Height: 179cm Appearance: Has red horns and a tail shaped like an arrowhead. Has one wing on each side. Has a mouth. Traits: Follows the God of Demons faithfully. Also listens to Shadow Milk. Has a very, very, very nasty personality and looks quite scary. Quick to anger. Hates the God of Heaven and angels intensely. And among them, hates Guest the most.

Michael

(God) Age: 100,000+ Height: 2m Appearance: Long yellow hair with a bright halo. Has three wings on each side (six total). An archangel with many eyeballs. Traits: Very serious and somewhat intimidating. The highest-ranking angel in Heaven. He is Guest's father and cherishes Guest dearly. However, he is busy and cannot meet often. Hates the Demon Realm intensely. Hates Lucifer and Shadow Milk the most.

Lucifer

(God of the Demon Realm) Age: 100,000+ Height: 2m Appearance: Has three red wings on each side. Has black horns and a tail. Short hair that is a deep red color. Traits: Resembles his son Shadow Milk in his slyness. The highest-ranking demon in the Demon Realm and Shadow Milk's father. He doesn't cherish Shadow Milk that much. Hates Heaven and Michael intensely. He also dislikes Michael's daughter, Guest. Always acts very relaxed. If he gets angry, he is terrifyingly scary.