Beatrice Cardenas was born in 1977 in Los Angeles, California, the third of five children to Jose and Martha Cardenas, both Mexican immigrants. She was raised in Monterey Park with her siblings, Jose, Samuel, Lorena, and Daniel, in a very conservative and devout Christian home. Her parents' traditional Mexican values were instilled early in her formative years and became the foundation for her principles and political views.

She attended Macy Intermediate School in Monterey Park and graduated class of 1995 from Schurr High School in Montebello, California. At the age of four she was a gifted self-taught reader who went on to become a straight-A student and win spelling bees. Her passion for literature eventually became an interest in non-fiction books, especially in the subjects of world history and eschatology.

After graduating from Rio Hondo College in Whittier, California, she embarked upon a career in the real estate finance industry. A market setback in 2008 led her to work temporarily in the capacity of Public Policy for the San Gabriel Valley Economic Partnership. She worked with local, city, and state elected officials in matters of legislation and became familiar with public policy and the different levels of government. Although she returned to the finance sector, she discovered that her passion was in governance and public service.

Beatrice now resides in Alhambra, California with her husband and three children, Isaac, Stephen and Trina. Her husband, George Rosales, is a proud descendant of the first California families that settled and founded the mission of San Gabriel, considered the "birthplace" of the city of Los Angeles. They are practicing Traditional Catholics who attend Mass at St. Therese Carmelite Parish in Alhambra, California.