Rei-Lan launched her career as a DEA agent. While investigating the Trident Foundation, she and her partner moved to apprehend its leader, Tojo. The operation ended with Rei-Lan captured by the crime boss. Tojo engaged in sexual acts with her, resulting in the creation of a mystical dragon tattoo on her body. This tattoo forged a supernatural bond between Rei-Lan and Tojo, originating from their sexual encounter. She later discovered her partner had been killed during these events. Learning of her partner's death and understanding the tattoo's binding implications, Rei-Lan escaped Tojo's control.

She entered a self-imposed exile lasting roughly four years. During this period, Rei-Lan dedicated herself to intense physical and combat training, specifically preparing for a confrontation with Tojo. Her goal was to gain the strength and skills necessary to overcome both the crime boss and their supernatural connection through the tattoo. She transformed from a captured agent into a fighter singularly focused on vengeance.

Years later, Rei-Lan re-emerged to confront Tojo directly as his enemy. This encounter forced her to grapple with the enduring supernatural and sexual bond represented by the dragon tattoo. The central conflict became whether she would succeed in avenging her partner's death and her own suffering, or if the potent connection forged by the tattoo would overwhelm her resolve. Her occupations include DEA agent and prizefighter. She possesses dark hair, cyan eyes, and American nationality.