Ryuji Ikeda (池田 竜次 Ikeda Ryuji) is the leader of Team Spiral and referred to as Zero. Ikeda's family staff a temple - moreover, his father is the temple's head priest and as a result has ample funds to finance his racing career.
Ikeda is an older racer and is very calm and level headed even in the heat of a race. He prepares for races by zoning out. Ikeda believes in a theory he created known as "Zero Theory" in which car and driver come together to become a single entity. To do so, a great deal of tuning has to be done to a car in order to match the characteristics of the driver to attain a higher level of racing.
When asked by Junichi Sakamoto, the number 2 driver of Team Spiral, what he thinks about when zoning out, Ikeda replies with "I don't think about anything. It's how I empty my mind and focus."
Shortly before Team Spiral's race with Project D, Ikeda is challenged to an unofficial race by Rin Hojo. Ikeda is pushed to his limits and bows out of the race in an attempt to prevent any damage to his car before the race with Project D.
During the race with Project D, he remains in a confident position until he reaches a section of the track where it had been fogged over. This makes Ikeda hesitate, which goes against his zero theory.
After being defeated by Project D, he spectates the race between Ryosuke Takahashi and Rin Hojo, and helps Takahashi in his attempt to stop the Grim Reaper's GT-R, when his brakes and tires got dangerously worn out.
He makes a return in MF Ghost as a special guest for a race commentary starting in chapter 63. It is mentioned that he is now the director of the Zero Theory School, as well as the municipal representative of his own city district, working both to better Motorsports, and to introduce district policies to improve teenage health and well-being.
He is also stated to help out by acting as head of the family temple on occasion.
|Act 1:||Absent||Act 8:||Appears|
|Act 2:||Introduced||Act 9:||Appears|
|Act 3:||Absent||Act 10:||Appears|
|Act 4:||Absent||Act 11:||Appears|
|Act 5:||Absent||Act 12:||Appears|
|Act 6:||Appears||Act 13:||Appears|
|Act 7:||Appears||Act 14:||Appears|
|Act 1:||Absent||Act 3:||Appears|
|Act 2:||Absent||Act 4:||Appears|