Sarabeth is the main antagonist in Monster Blood. She is an evil sorceress that took the appearance of a black cat and since then had been living with the Evan Ross' aunt, Kathryn. Later, is revealed that she was the cause of Kathryn's deafness and the reason why the Monster Blood is evil.
Finally, when she tells Monster Blood to kill Evan and Kathryn. Trigger appears, pushing Sarabeth towards the Monster Blood causing her death.
Sarabeth's appearance on the television episode is similar to her appearance in the book. However, she is a little bit older.
She also appears in a footage archive in More Monster Blood, but she don't makes an appearance.