Benmaru 望月六郎 (弁丸)

A young boy who meets Saizo and the others during their travels. Despite his young age, his skill with fireworks and traps is enough to make sport of adults, and he's seeking a lord worth serving. His real name is Mochizuki Rokuro, but Yukimura gives him the name Benmaru (who is Yukimura's second name) to distinguish him from Unno Rokuro.