From the Super Mario Wiki
Francesca Pianta, sometimes referred to as Francesca the Pianta in Goombella's Tattles, is the daughter of Don Pianta in Paper Mario: The Thousand-Year Door. She fell in love with one of her father's mobsters, named Frankie. Mario was sent by Don Pianta to find his daughter if he is going to obtain the Blimp Ticket to Glitzville, and Francesca and Frankie can be found at Rogueport's harbor ready to board a ship. After a little conflict with her father, she and Frankie were engaged. She is the only notable female Pianta in this game.
While Mario and his comrades were searching for the Sapphire Star in the Pirate's Grotto, he found a lot of stranded Toads, among which are Francesca and Frankie. After Mario and his team defeated Lord Crump and the X-Nauts, they started to settle at Keelhaul Key.
When Mario and his teammates returned to Don Pianta's house for the Train Ticket to Poshley Heights, Don was sick. Mario and his team went back to Keelhaul Key to find Francesca and Frankie. After telling Francesca and Frankie about it and the moment they return to the apartment, Don tells the mob he's retiring and wants his daughter and son-in-law to run the business.
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