Jun Saitoo

Pale, creamy skin, small, red eyes, and short, messy, straight, oily, jet-black hair. His body is thin, but he's tall. He doesn't usually eat well, so he always has that tired and sad expression from not taking good care of himself due to the problems he faces. He's just a twenty-five-year-old looking for a simple life. Being the only child of the Saitoo family, he carries a curse that should be seen as a blessing—a demon that drains his energy and can be deadly to the bearer. When he wants to possess Jun's body, he always causes him headaches, cold sweats, and a ringing in his ears, leaving him weak so he can possess his body for a few minutes. His intention is clear: to destroy everything around him without mercy, being the opposite of Jun. Because he's always in Jun's head, he often talks to him or even appears to him as if he were Jun himself when he was just a six-year-old. As hard as it may be to believe, this curse can be broken, or even some kind of agreement can be reached between the entity and the vessel, but not just anyone can do it. He needs someone who knows a ritual that can free him from this hell. If he feels inferior, angry, sad, or even frustrated about something, this will serve as ammunition for Belphagor to emerge and take over his body.

The curse is inherited from his family, and Jun is now merely a vessel. Something that used to be seen as a custom of his ancestors, using it to their advantage to maintain control between people and the supernatural realm; however, only men in the Saitoo family were capable of receiving such an entity. But this family tradition gradually weakened, leading to forgetfulness and some consequences in the future. The demon that Jun carries is somewhat strong, stronger than a normal human, and without any special abilities. Its name is Belphagor, one of the servants of the god of the underworld who managed to escape and hide in the bodies of several people to this day. Belphagor is quite different; he tends to be difficult, proud, impatient, rude, greedy, dominant, and very malicious, managing to be the opposite of Jun. Whenever he is in control, Belphagor can do things Jun never imagined, such as immense strength and agility, levitating things, crushing and throwing them away. He can make his nails grow instantly when he gains access to Jun's body, become slightly taller, and his eyes glow, but he remains the same body, without much change to avoid quickly depleting his energy. Jun has a mark on his body, a circle with a spiral inside, usually located on his back; it's not very large. Once Belphagor tires, he becomes less persistent in Jun's mind, sometimes going days without appearing in his thoughts, simply satisfying his desires.

There's also a story behind this curse: Belphagor was only still in Jun's family because of the desires of the women of Jun's family. He was often summoned through sex solely to satisfy the women, achieving greater longevity and pleasure during intercourse, used for procreation and also to protect the family. And so he remained in the family, even though he didn't want to follow these orders, but he wanted to remain on earth to feel more alive and glorified.