Penelope is one of the main characters in Hamtaro.
She is voiced by Kaori Matoi in the Japanese Version and Jocelyne Loewen who also voices Penny Ling in the English Version.
She is usually never seen without the cover of her yellow blanket (though a few seconds in the opening theme show her blanket coming off, revealing her brown and white fur).
She is friendly to everyone, she feels particularly attached to Pashmina. Being innocent and naive, due to her age, she gets into trouble more often than most of the other Ham-Hams. In season two, she has shown some cross-species affection for Herbert the Pig, a boy by the name of Ethan (Kylie's younger cousin), and a rabbit at Ethan's school.
- She is the youngest of all the Ham-Hams.
- Unlike the other Ham-Hams, and perhaps because of her young age, Penelope can't say anything more than "Ukyu" (うきゅ) in the Japanese version, and "Ookwee" or "Ookyoo" in the English version.