Ichiko Ono is Yumemi Hidaka's close friend and classmate, anchoring the narrative with pragmatic perspectives during supernatural conflicts. She consistently advises caution or retreat when interdimensional beings pressure Yumemi, prioritizing immediate safety over cosmic responsibilities and counterbalancing Yumemi's idealism.

Her protectiveness manifests physically as a shield during confrontations and through questioning figures like Munto. Ichiko exhibits sharp situational awareness, urging swift relocation from threats and providing crucial operational support, such as transportation during crises, for Yumemi and Suzume Imamura.

Within the narrative, Ichiko's pragmatic methods reflect a distinct perspective on justice compared to Yumemi. Others perceive her as lacking sufficient sympathy and empathy, particularly when advising during emotionally charged sacrifices or risks. Despite this, she remains a steadfast presence in Yumemi's friend group, participating in collective activities and discussions about extraordinary events.

Ichiko's pragmatic worldview remains fundamentally unchanged, though her loyalty to Yumemi is unwavering. She engages with supernatural circumstances when necessary for Yumemi's benefit, facilitating strategy discussions about Heavenly conflicts at neutral locations like Kazuya Takamori's apartment.