Penelope (ちび丸ちゃん, Chibimaru-chan) is an adorable white and brown baby hamster. She is like a little sister to Pashmina. She wears a yellow blanket over herself. She is owned by Kylie.
Considered the youngest of all the Ham-Hams, Penelope is usually never seen without the cover of her yellow blanket. Although 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 three, 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. Unlike the other Ham-Hams, and perhaps because of her young age, Penelope can't say anything more than 'Ookwee!' or 'Ookyoo!' ('Ukyu!' in the original version).
- While Penelope is almost never seen without her blanket, there are a few cameos of her true look. In the opening song of the show, she is seen throwing her blanket up in the air.
- In episode 5, Kylie's sketch contains Penelope without her blanket. This is cut out in the English version, however, along with Kana's and June's sketches.
- In Hamtaro: Ham-Hams Unite, she takes her blanket off momentarily when going back to the Ham-Ham Clubhouse with Hamtaro.
- Name Meaning: Duck