Koyomi's eccentric homeroom teacher involved in supernatural incidents.
Izuko's institutional resources are vital to Koyomi's progress in the mummy arc.
Suruga operates as part of Koyomi's inner circle, relying on Izuko's expertise during their joint investigation.
Izuko documents and manages cases tied to Shinobu's long history, functioning as a clinical archivist of her existence.
Explore the full interactive character relationship map of Monogatari