Sonnet is the rival of Felicity of The Grim Adventures with Billy, Mandy, Felicity and Toby. She is voiced by Jennifer Hale.
Sonnet Glumsworth, the rival of Felicity who is just mean to her in Endsville Middle School. She is only 11 years old.
She has pale skin, curly blonde hair and blue eyes. She wears a hot pink dress, a pink hoodie, pink leggings and pink sneakers. She wears a school uniform like Brielle, Nerissa, Felicity and Kaitlyn does. She wears different clothing.
- She is similar to Mindy.