Reaper is the beloved pet cat of Agatha. Reaper is a bald with scratchy ears. In the beginning of the book, Reaper tries to attack Sophie while she is on the porch talking to Agatha through her front door. Some readers believe that after reading The School for Good and Evil that Reaper could tell that Sophie was evil and wanted her off of Agatha's porch, but that hasn't yet been clarified by the author Soman Chainani. No one knows how old Reaper is?


Agatha's first friend was Reaper. Agatha's mother, Callis of Netherwood, raised the then kitten as her own cat, and Reaper was full grown when Agatha was born.Throughout the first book, Agatha thinks about Reaper, and deeply misses him. When Agatha returns home in the second book, Reaper acts like she's a stranger, because she acts " Different." In the third book, when Agatha brings her prince, Tedros, home to Gavaldon, Reaper appeared to dislike Agatha even more because of her choice of mate, who disliked the cat heavily. Agatha appears sad, claiming, "He used to love me."


Just like any other under fed cat, Reaper's only real food source are the birds that fly into the graveyard. In the beginning of the story, Agatha states that "Reaper's running out of birds" when the cat tries to attack Sophie.