Zakuro is the leader of the BakuThieves and the mysterious person which Harubaru and his friends are after. He uses the Darkus attribute and his Guardian Bakugans are Dio Sivac, Bone Skuls and Seis Tavanel. His capability is tremendous that he easily defeated the Grif brothers by himself.

During the Tavanel Cup Zakuro returns and creates Seis Tavanel by using his darkness on Sechs Tavanel. Seis Tavanel then infects Zakuro turning him into an even darker creature.