Miyuki Shiratori attends school alongside Jiro Shutendo and harbors strong romantic feelings for him. Her physical appearance features smooth white skin, long black hair, and a developed figure. Miyuki frequently finds her clothing torn away by oni, leading to prolonged nudity, especially prominent in the OVA adaptation.

Initially shy and mild-mannered, Miyuki undergoes significant growth as her feelings for Jiro deepen. She becomes more resilient and assertive, compelling the oni Goki to help her join Jiro's interdimensional journey to Ongokukai. Her determination is such that she overlooks her own nudity upon reuniting with Jiro in a space-time bubble.

Despite her development, Miyuki retains ordinary human vulnerabilities, often screaming in terror when encountering demons or monsters, necessitating protection from the oni Senki. Her core character is defined by kindness and a caring nature.

She shares playful interactions with her older brother, Yusuke Shiratori, who is also Jiro's closest human friend. Briefly referenced is her background as an escaped demon sacrifice. Miyuki frequently becomes a target for abduction by antagonistic forces seeking to lure Jiro into confrontations, placing her in perilous situations orchestrated by demons or cultists.

Her character arc culminates in her voluntary journey across dimensions to support Jiro, marking her evolution from a timid schoolgirl to a resolute figure driven by love and loyalty.