She is a technical expert of the OSS.
Spy Kids 3-D: Game Over
In Spy Kids 3-D: Game Over, Juni Cortez, Carmen's brother, reunites with Donnagon and Francesca Giggles, who tell him that Carmen was captured by the Toymaker, an evil villain who plans to use a video game, called "Game Over", to posess its players. After meeting with Donnagon and Francesca, Juni agrees to venture into the reality-based video game in order to save his sister.
Francesca Giggles may have been responsible for influencing her husband to renounce his evil ways, after his attempt to take over the world with the transmooker device. Although Francesca only makes an appearance in the third movie, her daughter Gerti mentions her in the second film, Spy Kids 2: The Island of Lost Dreams.