Melba is a female goat who is Goat's younger sister.
Melba has a bit of a nerdy personality; she can appear to be quite annoying but means no actual harm. She is supposedly very good at finding people, as she found Goat several times while she tried to run away from her at the DJ Wheelbarrow Full of Nachos concert. She is not very naive as she can very quickly see through Goat's schemes, such as taking a fake shower to escape The Treehouse.
Melba looks very similar to Goat, but shorter. She wears braces, round green glasses, several bracelets around her wrists and hair clips around her ears. She also wears a white shirt with a green tie around the neck, a green skirt, and shoes with white and green striped socks.