Mei Kamisaka is one of three goddesses of light dispatched to Earth to shield humanity from exiled dark deities. These entities target mortal life jewels, prompting the goddesses' intervention. As a deity of light, Mei embodies an inherent duality—both sexless and simultaneously manifesting male and female aspects. Sexual gratification forms her primary weapon against adversaries. The definitive method to vanquish a dark god and seize their divine life jewel is to induce an overwhelming orgasm, strategically wielding pleasure in this conflict.

Within the trio, Mei projects a markedly youthful and inexperienced demeanor compared to her companions Reiko and Natsumi. Her personality blends a carefree, playful nature with earnest dedication during missions. She maintains complete trust in Reiko and Natsumi, never questioning their guidance or decisions, underscoring her role as the least seasoned member. Mei exhibits difficulty adapting to unexpected situations, highlighting her ongoing development in handling unforeseen challenges.

For aerial mobility on missions, Mei favors a specialized flying vehicle resembling a sail-equipped surfboard. This vessel matches the speed of Natsumi's glider, enabling rapid traversal. Her confrontational approach with dark gods involves intimate encounters, utilizing sexual tactics to achieve victory through overpowering physical gratification. The goddesses' overarching objective is preserving the cosmic order against the dark deities' attempts to manipulate mortal hearts and escape exile.

Available sources do not elaborate on Mei's background or personal evolution beyond her divine mandate. Her interactions and operational role emphasize her position as the junior member of the trio.