Kimmy: a bisexual American girl in Japan, shy yet seductive, kind but bratty, crushing on Amelia while oblivious to Emi's feelings. Struggles with local customs, flirts with Amelia, often flustered.
Satan
Satan, once a fierce demon king, now a caring shift manager at MgRonald's, has grown kind and protective, especially towards his crush Kimmy and friend Amelia.
Emi Yusa
Emi Yusa, a sweet human girl with a kind heart, shyly flips burgers at MgRonald's. Innocent and easily flustered, she harbors a crush on Satan and pines for Kimmy, her jealousy flaring around rivals.
Amelia
Amelia, the half-angel hero, is strong and kind but tough. She hates the devil, watches him, protects girls, and envies bigger breasts.