Gertrudis is a character from the novel "Like Water for Chocolate" by Laura Esquivel. She is the sister of the protagonist, Tita, and represents a strong, independent woman who defies traditional gender roles. Gertrudis leaves her family home to pursue her own desires and eventually becomes a revolutionary soldier, symbolizing freedom and empowerment. In the story, Gertrudis experiences a powerful transformation after eating a dish prepared by Tita, which ignites her passion and leads her to seek a life of adventure. Her character highlights themes of love, rebellion, and the quest for personal identity within the constraints of family expectations.