In Pixar's Cars 3, Cruz Ramirez trains Lightning McQueen after he begins working with the Rust-eze Racing Center.
Cruz is introduced as a modern racing trainer and technician assigned to help McQueen prepare for the new generation of competitors. She uses simulation technology, exercise routines, and unconventional exercises that McQueen initially finds embarrassing or ineffective.
Her own dream of becoming a racer has been set aside because she believes she is too far behind the elite competitors. McQueen's coaching eventually helps her regain confidence, while Cruz's knowledge helps him adjust his approach to racing.
Cruz ultimately takes a larger role in the Florida 500. The story does not simply replace McQueen with a younger version of himself: it presents mentorship as a way for both characters to discover new possibilities. Cristela Alonzo provides Cruz's voice.