He is a hired thug, who along with his twin brother Kotaro was hired by Yoshiyasu Yanagisawa a corrupt imperial auditor, to cause panic by randomly attacking people around the town.  They both specialize in the use of the Kikuchi yari.

The stage is the close of the Edo period, an age when, not unlike our own time, both natural and man-made disasters left chaos in their wake. Manjiro makes a living helping the people of the troubled capital city, but behind the scenes, he also works in secret to take back precious belongings stolen from the people by unjust political powers and conspiratorial menaces. The people call him "Get-backer Roman."<br><br>
(Source: Crunchyroll)

__Hobbies:__ driving, historical research

Kojiro