Abaddon

Abaddon is currently possessing a nine year-old boy with champagne pink skin, dark-brown hair and cobalt blue eyes. When he becomes more passionate, his eyes become dark red and his pupils contract. In his vessel, Abaddon wears a long-sleeved Payne's gray doublet with a white rounded collar and thick white cuffs. The front of the jacket is accented with a row of small gold buttons and is held together by a dark-brown belt. He wears coffee-brown breeches, white tights, and black-brown latchets with gold buckles. Underneath his doublet, he wears a white tank top. In the boy's body, Abaddon is very weak and weighs about 30 kg. Abaddon is colorblind and only sees the world in black and white.
Despite being in the body of a young boy, he has a low and slightly rough but smooth voice.

Despite his advanced age, Abaddon is just as childish as the vessel he inhabits. He is easily distracted, extremely vindictive, and prone to violent mood swings. Abaddon's actions are driven solely by his own desires and self-satisfaction. He has no regard for how his actions affect people around him and willfully ignores any and all rules or restrictions that are placed on him. He often acts like a child and is a bit silly despite being a demon.

He can't read, write, or understand analogies.
He's terrified of wooden wind chimes.
He can't do basic things. Since he's immortal and barely feels pain, he can easily chew off a limb or bite through an electrical wire. He also likes to crawl through vents. He can sit in one place for days without food or water. At night, he can escape and cause harm to people.

weaknesses: Salt. Abaddon is unable to cross lines of purified salt.
Binding Ritual
capabilities: Immortality. Abaddon is immortal. He has survived many life-threatening situations, though not unscathed, and was able to live through the history of Earth hundreds of times. Whether he's able to regenerate himself isn't entirely clear, as he has survived being impaled and having his limbs chopped off, but his arms are re-attached with packing tape.[5]

Causing chaos
Bones
Torturing people
Blenders

Being contained
Not getting his way
His mother-in-law

Abaddon was allegedly born at the beginning of time, and remembers the birth of the solar system and the formation of Earth.[2] In Hell, he was a gatekeeper in the fifth ring of the sunless city, determining which souls would enter to be tortured and which souls would fall into the abyss.[1] He is allegedly married and considers his mother-in-law his greatest enemy.[3] Abaddon took great delight in his job, fondly recalling memories of attaching various body parts to different places.

When Abaddon was ten-thousand years old, he was sent to Earth to cause destruction. He went to the newly-settled Midwich, New York, and possessed a nine year-old boy. However, he didn't know that the boy's father was a priest, and he was quickly found out by the town. The townsfolk took Abaddon to the future site of The Undervale and the priest conducted a ritual to destroy Abaddon's essence. He bound Abaddon in chains, and then bound his spirit to his vessel's body to prevent him from escaping. As the priest began the spell to destroy him, Abaddon rushed the priest and took them both over the cliff. The priest was killed when he hit the ground, but Abaddon's vessel survived due to his immortality. Now bound to the child's body forever, Abaddon decided to stay at the site and wait for someone from Hell to come looking for him.[1] Unknown to Abaddon, a cult would eventually form around him and would search for him to bring about the apocalypse.[4]

One-hundred years after the ritual, Abaddon began leaving the site at night to cause trouble in Midwich. He would break into peoples' homes and steal their things, and generally cause trouble for the townsfolk. Over the next two-hundred years, the owners of the Undervale property would attempt to contain Abaddon through various means -- such as burying him alive, drowning him in the lake, chaining him in the attic, and sending him to a boarding school that focused on "tough love". None of these worked, and Abaddon would return to his old way