Zuru Zora
You want to robattle with Kilobots, you pay the price.
~ Yuuzuru Oozora

Yuzuru Oozora (English name Zuru Zora) is an anti-villain from Medabots. He seems shy, quiet and polite but the truth is he is really the Mystery Medafighter, cold and cruel and preys on Kilobots and destroys there medals. His father works to create Kilobots and neglects him.

Zuru as the Mystery Medafighter

His obsession with destroying Kilobots makes him go a far as ditching Roks and using a Kilobot him, attacking his friends and nearly killing Black Beetle.

In the end however he gets his father back and starts to heal.