Bamboo Man, alias "B.," operates as a high-ranking operative within the Esperanza syndicate, a criminal network trafficking the illicit drug Anthem. He sports a garish clown-like ensemble and mask, his teeth replaced by glinting rubies—a macabre signature. Initially positioned as a subordinate, he is later exposed as an imposter who infiltrated Lisvalletta’s government by masquerading as Brian Cooper, a military secretary, orchestrating schemes from within the nation’s defense infrastructure.

His augmented physiology grants him superhuman strength, agility, and facial-shifting abilities, surpassing standard Anthem users. These traits derive from genetic engineering, enhanced by carefully calibrated Anthem doses that amplify his power without inducing the drug’s catastrophic "overdrive" state, allowing sustained covert dominance.

Ruthlessly pragmatic, Bamboo Man subjects victims like factory foreman Tommy to forced Anthem consumption, weaponizing their mutations into monstrous assets to advance Esperanza’s agenda. His loyalty is exclusively pledged to Zabel Franken, the syndicate’s shadow leader, whom he aids by neutralizing rivals and executing strategic power plays.

Balancing dual identities as both Esperanza enforcer and government insider, he employs his Cooper persona to sabotage counter-narcotics operations. His meticulously plotted maneuvers intensify clashes with the SEVEN-O unit, forcing its members to confront escalating threats that strain their tactical and investigative limits.