Lia Venegas is one of the main characters in Bakugan: Geogan Rising, continuing her role as a member of the Awesome Ones, a group of friends who create videos for the site ViewTube. She is a Chilean-American girl who serves as the team's director and primary video editor, having joined Dan Kouzo and Wynton Styles after she helped them improve a failed stunt video. Her artistic and expressive nature makes her confident and inspirational to those around her. She possesses seemingly limitless energy and actively encourages others to participate in her projects, believing that people who follow their instincts live the happiest lives. She is an out-of-the-box thinker who helps others discover their hidden talents through experimentation, fearlessness, and empathy.

Lia's personality is defined by her strong will and refusal to tolerate mistreatment. She has spent her whole life standing up to those who tried to pick on her for being different, and no one ever tried a second time. She is as strong as she is creative and never backs down from a conflict, even when it might be wiser to do so. Her motivations center on having fun, supporting her friends, and creating engaging content, but she also has a serious side when protecting those she cares about. She is fiercely loyal to Dan and Wynton, and the three have a deep bond that endures disagreements.

In Geogan Rising, Lia's previous guardian Bakugan, Pegatrix, is absent, and she forms a new partnership with Haos Fenneca, a Bakugan she first encounters on Vestroia. Their relationship begins with friction as Fenneca resists Lia's guidance, but over time they learn to work together effectively. Lia also uses the Haos Geogan Arachnia during this season. As a brawler, she uses the Haos faction, which focuses on light and healing abilities, and her strategic creativity makes her a valuable asset in battles. Throughout the story, she remains a key protagonist, helping the Awesome Ones confront new threats while navigating personal growth and her evolving bond with her Bakugan.