Lavagirl is a fictional character from the 2005 family film titled "The Adventures of Sharkboy and Lavagirl in 3-D." She is portrayed as a young girl with the ability to control and manipulate lava, showcasing her powers through fiery abilities and vibrant visuals. In the film, Lavagirl teams up with Sharkboy, another superhero character, to help a young boy named Max who is struggling with his imagination. Together, they embark on a fantastical journey to save their dream world from an evil force known as Mr. Electric.