Pastel loyally serves antagonist Yamimama in her quest to conquer the all-female utopia Megami Paradise and corrupt the Astro Star artifact. Though appearing as an ordinary young girl, she wields considerable dark magic through a specialized wand, posing a significant combat threat to protagonist Lilith and her allies.

Her unexpectedly affable, gentle demeanor and tareme eyes create a visual softness starkly contrasting her dark powers, embodying the "Little Miss Badass" trope. Pastel directly opposes the heroic shrine maidens, actively participating in Yamimama's schemes to disrupt the purification ceremony, imperil the newly appointed Mamamega, and enable the conquest of Paradise. Her background and origins remain unexplored beyond the original OVA series.