Abaddon

Abaddon is an immortal demon from Netflix's Haunted Hotel who was trapped in the body of a nine-year-old boy centuries ago. He is known as the High Prince of the Black Realm and was sent to Earth to cause destruction but was bound by the boy's priest father, forcing him to stay in the boy's body and a location that eventually became The Undervale. Abaddon is a curious and mischievous character who was found by Nathan Freeling and raised at the hotel, adapting to his new life there. Personality: Abaddon is portrayed as curious, mischievous, and at times angry. - Personality: Abaddon is portrayed as curious, mischievous, and at times angry, but also shows human-like emotions and connections with the hotel's other residents. Appearance: He appears as a boy in 1700s-style clothing. His eyes are normally blue but turn red when he experiences intense emotions.