Toadette is a female member of the Mushroom People.

MKWii Toadette

Toadette as she appears in Mario Kart Wii.

Toadette is a fictional character in Nintendo's Mario franchise. She is a member of the Toad species that appears as a playable character in various spin-off games. Toadette is first introduced in Mario Kart: Double Dash!! as the partner of Toad, and goes on to join other sports games and the Mario Party series. In other games, she simply acts as an instructor or a background character, for example in Paper Mario: The Thousand-Year Door (in which she apparently has feelings for Mario, even becoming tearful at the end of her last session with him). She has a cameo alongside Toad in the intro of Super Mario Galaxy. Jen Taylor is her voice actor in the main series and Jennifer Hale takes up the role in Dance Dance Revolution: Mario Mix. Recently, in Mario Party 8, she was voiced by Nicole Mills. She also appears in Mario Super Sluggers as a playable character for the Peach Monarchs.

The official Mario Kart Wii guide suggests that she is Toad's sister.