Car: Mitsubishi Lancer Evolution IV RS (CN9A) (color: scotia white)

Seiji Iwaki is the number two driver in the Lancer Evolution-only Emperor team, therefore he drives the Lancer Evolution IV. Seiji is a driver with good racing skills, but he is rather arrogant and overconfident and occasionally imprudent. He has won many races driving for Emperor against other teams, including Takeshi Nakazato of the NightKids and a member of Thunder.

One of Seiji's trademarks is to take the team sticker of teams he has defeated, cut it in half, and stick it on the sideblade of his spoiler upside-down, emulating the "kill" markers that fighter pilots paint on their planes.