Hah! I will have defeated you well before your feeble class is in session!

Hiro Karuta, the Ninja Prince of the Karuta Realm and the Exchange Student Zero is the main protagonist of both the movie and the series of the Battle Day/Exchange Student Zero Saga.


Passed off as a mysterious exchange student from Japan, Hiro is in fact a refugee from a violent anime world. A mix of Marine Boy, Encino Man and Kung Fu, it's clear that Hiro is not going to fit in easily at South Perth High School.


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  • It is possible that Hiro has aquaphobia - or the fear of water- seen when he steps into the ocean water and becomes petrified.
  • Hiro means 'generous' in Japanese.
  • He dislikes broccoli.