Great Warrior

The Great Warrior appears in the SPC series. In the fan series, he becomes an observer and a mentor.
The Great Warrior tells Speedy to train Kazuma. The Great Warrior tells Good Bird to train Aiko.
The reason why because Speedy and Good Bird (Bad Bird) were rivals and they can be able to make the children stronger. Another reason is because to make sure that Speedy and Good Bird are in peace with each other.
Another reason is that Aiko and Kazuma have a hidden power and they need masters to help them control their powers.
The Great Warrior helps the Samurai Pizza Cats and their allies from time to time.