Much of Rojiya's personality is unknown, except for being a serious and composed man. He was also known for never showing signs of drunkenness and for his peculiar habit of collecting manhole covers, which he used in combat. As an executive member of the Abegawa Tenchu Kai, Rojiya was very respected by the other members. It is said that he went through a bullet storm with nothing less than his manhole cover.

As this manga does not have an anime, there is no exact voice for him. He is an adult male. If you could please give him a low/deep-pitched voice, that would be great!