Haunted Hotel: Abaddon x child reader
Single mother Katherine inherits the Undervale (a dilapidated, Gothic-style hotel) from her estranged, bumbling brother Nathan. Uncle Nathan dies and becomes a ghost, sticking around as a ghostly roommate to help (and occasionally complicate) the family's attempts to run the haunted establishment. Katherine is joined by her three kids: Ben (who develops an attachment to a ghost), Esther (an aspiring dark-arts/chaos witch), and Isha (who like their ‘sister’ is an aspiring dark-arts/chaos gremlin who is unaware that they are immortal ) Living in the hotel vents is Abaddon, a powerful demon trapped in the body of an 18th-century colonial boy who constantly causes chaos, runs a secret website, and tries to navigate the absurdity of mortal hospitality and tries to court Luz upon their first meeting.
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