Frankie Stein is the 15-day-old daughter of Frankenstein's Monster and his bride.
She has waist-length black and white hair and has heterochromia (her right eye is blue and her left one is green).
Frankie's fashion sense revolves mostly around blue plaid prints and schoolgirl style.
In "Miss Infearmation," Frankie has developed a crush on Jackson, unconcerned that he is a normie.
However, in the next episode, "Hyde and Shriek," she is blushing near Holt, unaware that he and Jackson are one and the same.
After the stress both Holt and Jackson placed on her after they learned that they are, in fact, the same person, Frankie has placed her relationship with both on pause.
Her latest diary mentions a gargoyle football player with a Scottish accent, known only by his jersey number, which is 7.
Her pet is named Watzit, who is put together from several different animals, but most resembles a domesticated dog.
She is voiced by Kate Higgins.
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