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"Why, you little rat!"

- Sis

Sis is Harold's older sister, Gladys' sister-in-law and Billy's paternal aunt. She’s married to Nergal, with whom she has a human/monster son, Nergal Jr.

History[]

Aunt Sis first appears in Skeletons in the Water Closet when she brings her sister-in-law home with her to recover from a nervous breakdown.

Later, she house sits when the adults leave on a romantic trip. She reveals how she was once heartlessly dumped by her boyfriend during a dancing contest and has since sworn off relationships. Nevertheless, she meets Nergal, who is smitten with her and asks her out. Their date ends with him being attacked by bees. Seeing Nergal 'dancing' melts Sis' heart. They get married and move in together.

In Son of Nergal, it’s shown that Sis and Nergal have started a family. They sign their son up for a weekend camp to help him socialize and make friends.

In Nergal's Pizza, she manages the register and customer service of their family business. She is shown to have a good grasp on tricky customers.

Sis is finally seen on a picnic with her family. Beside the occasional mishaps that come with living in the Underworld, she’s content and in good health.

Appearance and personality[]

Aunt Sis is rather short and a bit chubby. She has curly strawberry blonde hair, a large nose and dark eyes with black cat-eyed glasses. She wears a yellow blouse, a long green skirt, a purple beaded necklace, red lipstick and red sneakers.

At first, Sis seems like the stereotypical old maid. However, it’s also apparent that she has known little kindness in life and thus has difficulty opening up and trusting people. Marriage brings out her tender side; Sis is fiercely devoted to her husband and son and dotes on them constantly. Harold and Gladys also turn to her in difficult times. Sis has a passion for dancing and crossword puzzles and is known to be a good cook.

Appearances[]

Grim & Evil[]

The Grim Adventures of Billy & Mandy[]

Films[]

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