The character played by Michelle Rodriguez in the Fast & Furious films is Letty Ortiz. Her full name is Leticia Ortiz-Toretto, and she is one of Dominic Toretto’s closest allies and a highly skilled street racer and mechanic.
Letty first appears in The Fast and the Furious (2001) as a member of Dom’s crew and his girlfriend. She participates in the group’s street-racing and hijacking activities, including the film’s climactic truck robbery, where her car rolls and she is injured. Later films expand her relationship with Dom, eventually establishing that they marry.
A major storyline follows Letty’s apparent death and later return. In Fast & Furious (2009), she works undercover and is believed to have been killed. Fast & Furious 6 reveals that she survived but suffers from amnesia, allowing the franchise to explore her gradual recovery of her memories. The character is sometimes confused with Mia Toretto, but Mia is Dom’s sister and is played by Jordana Brewster.