one of the twelve masters of the watch car battle league. Braking Braking is the hotheaded, cocky, and obnoxious follower and friend of Kai. He is 12 years old. He is shown to be incredibly loyal to Kai even staying by his side when he turned evil. He didn't even take his wrath out on him but on Jino instead, despite Kai being the one saying it. But his loyalty has seemed to stray at times such as when he was seen cheering for Sophie. He is somewhat strong but has fallen against Roy and Jino. Braking's watch car is X-ca. His watch car is built like a construction car. He is one of the twelve masters of the watch car battle league. Ain Ain is the genius mechanic who creates maniacal but ingenious inventions for every match he participates in. Hence it is hard to prepare against him. He is 12 years old. He is intelligent, crazy, and funny. He is shown to have a high IQ as he accidentally created a weapon for the black shadows. His watch car is Gaus. He is one of the twelve masters of the watch car battle league. Leo Leo is one of the twelve masters of the watch car battle league. He is the master of ice. He is cold, calculated, intelligent, and impulsive. Leo used to go to school with Roy, with whom they shared classes and were good friends. Leo's watch car was constantly harassed and the bullies who did it blamed it on Roy by placing his ball cap there. Leo then blamed him and attacked him causing Avan to jump in and protect him hurting his watch car in the process. Leo leaves after transferring to another school but held a grudge against him. He comes back after the Shadow used a dark key to transform him and his watch car. Sonny became Frone and Leo's appearance was altered. He now has white and blue on his outfit, ice blue eyes and white hair to match. He enters a match between him and Roy and Roy wins despite his attempts to kill Avan. In the end Roy is friends with him again. His watch car is Frone/Sonny. SamDong SamDong is one of the twelve masters in the watch car battle league. He is 13 years old. He seems to stay at his opponents houses before the match