Riley is one of the player's earliest rivals and later becomes an ally in the game's
Riley's car is a NISMO 350Z, specifically inspired by the one built by Signal Auto in 2005. While that 350z was swapped with an SR20DET engine, Riley's 350Z is presumed to retain the VQ35DE engine. As is common with 350Zs, Riley's transmission failed under stress. However, she remains an active part of the story, continuing to support the player and engaging in further races—especially after encountering Jesse.