The Japanese qualifiers arc
In Japan, Kate first met Tyson when she helped him making his beyblade spinning four times faster in order to defeat Carlos. So Tyson invited her to see his fight. Kate got very proud of the boy when he won the battle, but she also got worried when Kai appeared and destroyed Tyson's beyblade in another match. Kenny told her that Kai was looking for beyblades with special powers.
Kate went to the Blade Sharks place and she was surprised by Kai, who asked what she wanted there. She got a little confused because she was not so good in Japanese, but she said that Kai did not know how many good bladers existed besides him, and that it would be good if he stopped treating other people like trash without even knowing them. He realized that Kate also had a bit beast and got very interested to know how much power she had. Soon after, the other Blade Sharks returned with a kidnapped Kenny, who got shocked when saw Kate there. Tyson arrived after and called her a traitress, but the girl only said that didn't promise him her loyalty.
After fighting against Kai again, Tyson challenged Kate to a battle because he wanted to see her bit beast, but she refused. So the boy insulted her saying that she was just a mean girl that was afraid of breaking her nails. Kate got very mad after that, and she decided to accept the challenge. Soon after, she defeated Tyson without any kind of trouble and she didn't even call Drangifer. She said that Tyson didn't know how to treat a lady. Kai was surprised about how powerful the girl was.
In the Japanese qualifers tournament, Kate was announced as a Mr. Dickenson special guest along with Ray. She defeated Kenny and other 8 young bladers in the group D free match, and Ray also became the winner of group E. Then Kate would have to battle against Max and Ray against Tyson. The two winners would confront each other and the last winner would go to the finals to battle against the current Japanese champion, Kai.
Kate defeated Max in the third round of the match. During the battle Max got Draciel for the very first time and so it was also the first fight where Kate called Drangifer. Everybody in the stadium got scared with the size of her bit beast.
After Ray gave up the battle against Tyson, Dickenson called him and Kate and told them about his plan to start a team to go to the world championship. Ray accepted without any doubt because he would like to be in the same team as Tyson, but Kate got surprised because she didn't know the championship would be in teams, as well as she also was angry because she was not a team player and didn't desire to be part of one. But Dickenson smiled and only said that she should try different experiences. She was not sure if she wanted to.
In Kate's match against Tyson, she was asking him why he thought he could be a champion. As she realized how determined the boy was, she thought that it would be great if he were part of Dickenson team and lost the battle on purpose. Tyson was confused and Kate just said that it was because she didn't want to break her nails. She was wondering that if Kai wanted a good opponent, he was going to have one. And just as she thought, Tyson defeated Kai in the finals and so Mr. Dickenson announced the team that would compete in the world championship.