Raid Mirroring is a black-haired, black-eyed demon operating as an antagonist. He conspires with the management of the Amada department store chain to manipulate Fino Bloodstone into inheriting her father's legacy and becoming the new demon ruler. His motivation stems from concern over the demons' loss of purpose after the Demon King's death; he believes peaceful coexistence with humans is unviable and restoring demonic leadership is essential. To achieve this, he enlists former hero trainees Blaze Dis and Klein Art to influence Fino and activate her father's magical amulet.

Raid previously attempted similar manipulation with Lamdimia Do Aximemor, who rejected his proposals. He shares a history with Seara August, Leon's store manager, where her formidable magical abilities thwarted his plans, making him reluctant to reengage her.

In the climax, Raid forces a bloodstone onto Fino to possess her, compelling her descent to the demon throne within a volcano to reignite war and restart the hero system. During this confrontation, he battles Seara, who overpowers him using retail-based tactics instead of conventional combat. After Fino is rescued by Raul Chaser, Raid attempts to withdraw but is confronted by Seara, who presents him with an invoice for damages, symbolizing his defeat through economic accountability.