Mio Nishizono's established characterization and narrative arc derive solely from the "Little Busters!" visual novel and anime. Within this core story, her key elements include her close relationship with Midori, the significant detail of her lacking a shadow, and her personal journey. The spin-off "Kud Wafter" exclusively centers on Riki Naoe and Kudryavka Noumi. Mio Nishizono has no attributed participation, scenes, dialogue, or thematic role in "Kud Wafter's" narrative, setting, or events.