Gromble's unnamed sister, is a character mentioned by The Gromble. She is the only one of his family members who has never been physically seen in the series.
She is the only Gromble's sister as he never mentioned having any other siblings.
She is the mother of Bomble and Chomble by different fathers as well as the daughter of Mama Gromble.
— This article is a stub. —
You can help your monster friends Aaahh!!! Real Monsters Wiki by expanding it.