Kato is Marucho Marukura's butler and has helped the Battle Brawlers many times by flying Marucho and the gang anywhere.
Kato is an old man with gray facial hair (his thick moustache to be accurate),round glasses and is always seen wearing a suit and circular glasses.
Bakugan Battle BrawlersEdit
Hal-G once tried to trick the Brawlers by impersonating Kato, but Shun found out when he didn't say "Master Marucho", as Hal-G didn't know how polite Kato was.
Bakugan Battle Brawlers: New VestroiaEdit
Kato also appears many times in Bakugan: New Vestroia, assisting the Brawlers once again (even when Marucho is not there).
Bakugan: Gundalian InvadersEdit
Kato appeared in Bakugan: Gundalian Invaders, when it shows Marucho at his home at the table with Ren Krawler.
Bakugan: Mechtanium SurgeEdit
In Arc 1, he is shown that he is now working with Shuuko Marukura, revealing that he has technological capabilities.
In Arc 2, he is now living in Bakugan City.
Kato working with Shuuko trying to fix Bakugan Interspace