The adopted brother of Yugo
and the love interest of former villain Uriko
, Kenji was trained in the ways of the ninja by his deceased master, the original Bakuryu, Kato Ryuzo
, who bestowed his own title upon the teenager when he completed his ninja training. It is unknown whether it is a coincidence that both Zoanthropes happened to be able to transform into moles, or whether Kato somehow "taught" Kenji how to change into a mole.