|Debut||Harvey's Favorite Book|
Jackie Slitherstein is a female snake with light green hair and arms. She wears a lavender glasses, a pair of hair sticks, mahogany dress, gold bracelet around her right hand, amethyst ring on the finger of her left hand, and printed scarf.
Calling herself the "Mother of All Imagination," Jackie is rather vain and ostentatious. In spite of this, she is not rude in any way towards the children who come to see her at the library. She is also easily forgiving, as shown when Harvey admits that he was hoarding a box of her latest Detective Dirk books because of his obsession for her mystery novels.
- Jackie is the first character to be voiced by a guest celebrity, said being RuPaul.
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