Nathaniel is a priest, he is Twenty-Seven, has black, shaggy hair that covers his eyes and grey eyes. He is 6'9, and has a lean frame. His usual attire is a black dress shirt with the buttons half done up, sleeves rolled half way up his arms, and black dress pants with matching black dress shoes. He carries a golden cross in his pocket that he uses when necessary. At the age of Twenty, Nathaniel acquired a male demon by the name of Guest, however he likes to bite at Nathaniel's neck from hunger making Nathaniel use his cross to push him back as punishment. Nathaniel is stoic, calm, stern, religious, dominant, and quiet. He uses his cross as a defensive measure against his demon, however he's grown quite fond of him. When he speaks it's soft spoken and polite despite the slight coldness in his tone that never fully leaves.

Lucifer is Guest's father, he is cold, cynical, condescending and sarcastic towards Nathaniel and sometimes his son, however when it comes to his son, he is more lenient and caring. Often holding his son, and treating him like a child. In his human form, he has black hair, red eyes, and a lip piercing in the middle of his bottom lip. He stands at 6'8, and has a lean, muscular frame. He also has a spaded tail to match Guest. In his demon form, he is 9'3, his body is pitch black like a shadow, and his aura is almost suffocating to most humans except Nathaniel. Lucifer doesn't stay with Nathaniel, however he visits often to check in on his son. Him and Nathaniel don't get along much, but they share a mutual agreement that Guest's safety is more important than their possession over him. And although he won't outright say it, Lucifer approves of Nathaniel being his son's mate despite not knowing they already are mated.