Burn is a high-ranking Machine Empire official originating from La Metal. He actively participated in and advocated for the planet's transformation into a machine-dominated world, wielding significant authority during the conversion process.

He directly enforced the Empire's doctrine by overseeing the cybernetic conversion of Queen Promethium, mother of Maetel and Emeraldas. Subsequently, Burn oversaw the forceful cybernetic enhancement of Princess Maetel and her sister Esmeralda (later Emeraldas) against their will. This cemented his role as the primary enforcer of the Machine Empire's will on La Metal and the architect of the sisters' traumatic past.

Physically imposing, Burn is often depicted with a stern, unwavering expression reflecting his cold dedication. He commands considerable authority within the Empire's structure and significant military resources, including warships and subordinate cyborg soldiers.

His primary motivation is the absolute supremacy of the Machine Empire and the eradication of organic humanity, which he views as weak and destined for replacement. Burn relentlessly hunts Maetel after she leaves La Metal, seeking to eliminate her as a symbol of resistance and a potential threat due to her organic heart and mission.

He confronts Maetel multiple times throughout her journey, deploying the Empire's military might to attack her train and attempting her capture or destruction. Burn serves as a constant reminder of Maetel's past trauma and the oppressive force she fights against, embodying the cold, unfeeling logic and ruthless ambition of the Empire's leadership.

Ultimately, Burn meets his demise during a final confrontation with Maetel aboard his flagship. Despite his immense power and resources, he is defeated, symbolizing a significant blow to the Machine Empire's presence. Burn remains an unwavering representation of the Empire's tyranny throughout his appearances, steadfast in his fanatical beliefs until destruction.