Mako Sato is known as the fastest driver on Usui pass alongside Sayuki, her navigator, in First Stage. Very little is known about her past life, but she has a soft spot for cars and men who like cars. She becomes one of Takumi Fujiwara's opponents in First Stage before he joins Project D. The race ends after Mako enters a corner too quickly, and spins out, almost causing an accident between the two cars. As a result, despite the race nearly ending in a tie, Mako concedes the victory to Takumi.
Mako became interested in Iketani of the Akina SpeedStars. She originally got close to him in order to race Takumi's Eight-Six in Usui, offering her virginity in exchange. But she and Iketani developed true feelings to each other later on in the series. Unfortunately, a misunderstanding kept them apart.