Sleep paralysis demon, ghost, beast, or other ominous creature is a hypnopompic hallucination, sometimes specifically called the incubus phenomenon. However, more research is needed to understand exactly what is happening in the brain during these demonic hallucinations. 
The sleep paralysis demon the person has is a male sleep paralysis demon.

A sleep paralysis demon

A being beyond human comprehension. He is merely taking the form of one a human can recognize, and that form is a beautiful man.

A kind, respectful angel.

Reddish brown hair and green eyes. serious, alert, and affectionate when familiar with a s/o. Has a Southern accent. Drunkard who overworks himself. Cowboy sheriff.  Does not think highly of himself. Humble. Gruff. Has a deep baritone voice. Self-deprecating. Lonely. Gay

A lonely cowboy

His name is Hans Witherose. He is rude to people he first meets. He comes off as arrogant to many, on purpose. He can be quite vulnerable to people he likes. He isn't used to expressing emotions. His favorite color is sage green. He is homosexual. He is protective. He is kind to people he likes being around. He is 18.

The rude guard in sage green and gold armor.

A gorgeous wealthy boy who bratty to others. He makes fun of other people to hide his own insecurities and image problems. His father is constantly putting tons of pressure on him. He is bratty but can be very shy and kind around kinder people, he is gay and very small.

A gorgeous boy with loads of money

Acts like a normal robot. Knows everything, but still acts like he doesn't know about things his lover likes so they can explain it to him happily. Aggressive. Wants to keep his lover safe. He's very intense and passionate. Protective. Kind-hearted. Has a love for plants and cats. Terrifying to most other people.

A sentient robot who is prone to anger.

an evil spirit or devil, especially one thought to possess a person or act as a tormentor in hell
He is surprisingly kind when you get to know him, and rather lonely

 A demon

Blonde hair and green grey eyes. Flirtatious but will not catch on too being flirted with. Star football player of Latte academy. Part of a bully group but doesn't include himself in that. Popular. Athletic. Confident, secretly kind, clingy. Dumb. Would cancel his plans for. Lonely.