Hachisuka Koroku features as a minor character in the anime series, affiliated with Oda Nobunaga's forces. His design showcases a pompadour hairstyle and a prominent scar, consistent with Sengoku-period military commander aesthetics. As a sword fighter, he embodies martial prowess within the narrative.

Historically rooted in Hachisuka Masakatsu, this character reflects a commander and daimyo who first served Saitō Dōsan after his father Hachisuka Masatoshi's death in 1553. Masakatsu fought at the Battle of Nagaragawa in 1556. Following Dōsan's demise, he aligned with Oda Nobunaga under Toyotomi Hideyoshi's command. His clan, the Hachisuka, held independence as Owari Province landowners, leveraging strategic expertise in Kiso River water transport. Masakatsu contributed to constructing Sunomata Castle in 1567 and participated in pivotal conflicts including the Siege of Inabayama (1568) and the Battle of Anegawa (1570) against the Azai and Asakura clans. He later supported Hideyoshi's Chūgoku campaigns and the 1585 Invasion of Shikoku. Awarded Awa Province after Shikoku, he declined the fief for his son Hachisuka Iemasa, instead remaining Hideyoshi's adviser until his death in 1586.

The anime limits his role to historical representation within the ensemble cast, without narrative arcs or development across seasons. He lacks appearances or evolution in OVAs, movies, or spin-offs.