Kyoko Iwase

Nickname in English adaptations: "Kylie"

A skilled uphill driving ace in the Northwest Saitama Alliance, Kyoko (岩瀬 恭子 Iwase Kyōko) was originally the fastest in the alliance, but after racing against Keisuke Takahashi, she falls in love with her opponent. This creates a conflict of interest between defeating Project D and supporting her love. Love prevailed. Attesting to this, Kyoko later lent her FD3S to Keisuke after he damaged the left front suspension of his own FD3S in an accident during a trial run on Tsuchizaka. Keisuke went on to win the race with her car, instead of the loaned FD Ryosuke planned for him to use. Unfortunately for her, Keisuke chooses to focus on Project D to the exclusion of all romantic relationships—although he admits liking her.

Kyoko's FD is a single turbo (compared to Keisuke's twin-turbo FD). Because of this, it has lesser torque and more turbo lag despite the power output being almost the same.