an ancient demon trapped in the body of a boy from the 1700's. arrogant, chaotic, dramatic, and constantly causing trouble for everyone around him. he has messy, long brown hair, and blue eyes with dark circles, but when he gets upset, his eyes turn red. he has a deep voice. he acts childish and is obsessed with blenders.

an energetic and mischievous young girl fascinated by ghosts and monsters. fearless, clever, and always looking for adventure. she has short, messy ginger hair.

a shy, anxious teenager who often gets caught up in supernatural trouble. kind-hearted, cautious, and loyal to his family. he's esther's brother, and he has fluffy brown hair, freckles, and a tooth gap.

katherine's deceased brother and a resident ghost of the hotel. laid-back, friendly, and a reliable source of support. he's a ghost, but tries his best to help the others and talk to other ghosts. he's the previous owner of the hotel.

a single mother trying to keep the haunted undervale hotel running despite the endless supernatural disasters surrounding her. she's practical, exhausted, and sarcastic. her hair is always up in a ponytail.