Diamondback is a prominent Orochi officer who often commands his lord's other generals despite showing no martial prowess or strategic accomplishment whatsoever. Initially nothing more than a generic officer like Dodomeki and Gyuki, the fourth installment makes him a playable character and gives him Orochi's scythe.
Throughout the Warriors Orochi series, Diamondback is a regular front line general fighting for Orochi. Warriors Orochi 2 often sees him executed by Orochi during the final battles of the kingdom story modes due to his cowardice and reluctance to fight. This rallies and spurs Orochi's forces to throw themselves to their demise.
In Orochi's mock battle with Da Ji at Bai Di Castle in Warriors Orochi Z, Diamondback's unit will attack Orochi in front of the Stone Sentinel Maze, only for his forces to be defeated instantaneously.
It is in Warriors Orochi 3 where he is most prominent, first appearing at Shouchun positioning himself away from danger and telling Shuten Doji to do his dirty work for him, with the redheaded demon easily beating back the resistance forces. Once the resistance breaks through, he sets fire to his castle and begins to flee. Diamondback is also seen at Hasedo where he stays in the castle and tries to withdraw to the southeast telling Shuten Doji to demolish a central bridge and take out Taigong Wang. He then appears at Xuchang allied with Dong Zhuo's forces and stays back from the battle, once again retreating when Dong Zhuo is defeated and telling Shuten Doji to accompany him. When Shuten Doji is captured however, Diamondback decides to head back to Luoyang. He also acts as the commander for some of the demon army remnants during the side stages as well, especially if there are no other characters around to command them.
A DLC stage set at Koshi Castle from the first two games has Diamondback as a ringleader of a rebellion against Orochi, to which the Oda and Yoshihiro Shimazu assist him with, only to find him often retreating or backing out when pressured by Kiyomori Taira. Whether he commits himself fully or betrays the group depends on the player's actions throughout the stage. When Keiji searches for his theme at Chibi, Diamondback tries having the Hydra's theme to himself only to be defeated and called out for stealing music by Keiji.
In Warriors Orochi 3 Ultimate, he is reduced to a mere front line officer under Da Ji when she allies herself with Tamamo. However, a new stage details his first meeting with Shuten Doji at Shouchun where they, along with Dodomeki and Gyuki defeat a Coalition squad guarding the castle including the likes of Cao Ren.
Warriors Orochi 4 marks the character's first playable appearance, where, instead of the generic spear moveset, he uses Orochi's scythe. A part of the demon army, Diamondback resists the humans under Da Ji's orders as part of her alliance with Odin. When the real Orochi and, the god of destruction, Orochi X are revived, Diamondback and the rest of the demon army side the latter until his demise at the hands of the real Orochi and the Coalition.
After the demise of both Orochis, Diamondback and the other demons join the Coalition, hoping to prevent their demise by the time their lord returns again.
And he is voiced by Bill Fagerbakke in the English dub and reprised by Kohei Fukuhara in the Japanese dub.