Metatron serves as an archangel embodying the Heavenly Virtue of Charity, descending to Earth as a nurse seeking human Messiah candidates to guide humanity toward virtue. Her mission involves nursing candidates back to health, but unintended harm often follows due to her clumsiness and poor eyesight.

Physically, she presents as an attractive female with large breasts, a pronounced round lower body, and long aqua hair fading to pink at the ends in twintails. Her angelic nurse uniform includes a heart-shaped neckline exposing her chest, a tight skirt revealing white panties, and blue wings affixed to her ankles. Measurements specify a 94 cm bust, 59 cm waist, and 85 cm hips.

Her personality splits dramatically: typically timid, naive, and selflessly compliant, she struggles with forgetfulness and medical incompetence, frequently worsening patients' conditions. This causes deep concern for her older sister, Sandalphon. Yet when holding a syringe, she shifts into a sexually charged sadist exhibiting expert medical knowledge and an obsessive drive to inflict extreme, painful treatments. Post-episode, she tearfully regrets her actions.

Metatron wields a syringe gun containing adjustable cure-all medicine, strongest intravenously. She employs self-bondage to accomplish tasks without hands. Sandalphon invents devices to aid her, though Metatron's ineptitude perpetuates her sister's anxiety.

Her endeavors highlight a core irony: despite representing Charity, her forced care and split personality consistently harm patients, mirroring the broader ineffectiveness of the Seven Heavenly Virtues in upholding their ideals.