Toadia in Paper Mario: The Thousand-Year Door.
She would have something posted on the Trouble Center, which is to meet Luigi. Mario would require the L Emblem to complete this trouble. As he will wear it and look like Luigi. Once near the end of the trouble, the real Luigi shows up and Toadia thinks that the real Luigi, is the imposter and starts yelling at him. At the end, Toadia gives him a Choco Cake.
 Tattle Information
That's Toadia of Poshley Heights. She spends a lot of time thinking by this fountain. She's actually leading a double life as the secretary of the Luigi Fan Club.