Iona operates as a supporting character closely tied to Wiseman. She executes Wiseman's high-level summons, known as "calls," granting access to potent five-star allies during missions. This role establishes her as a critical tactical asset within Wiseman's operations.

Her residence starkly contrasts the protagonists' circumstances: she inhabits an opulent, palatial estate, diverging sharply from the dilapidated headquarters of Haru and his comrades. This disparity underscores her privileged standing in Wiseman's hierarchy.

A pivotal narrative moment occurs when the protagonists, lured by the prospect of gaining their own summoned allies, convince Iona to perform a call for them. This act triggers unforeseen chaos, trapping characters within mobile game applications.

Inside these artificial environments, characters exhibit varying awareness of their predicament. Some display confusion or distress upon sensing external manipulation—such as the unnerving feeling of being observed or controlled by unseen forces. This incident starkly reveals the inherent dangers of Iona's summoning abilities.

Iona remains defined by her connection to Wiseman, her specialized summoning role, and her involvement in this specific event that propels the meta-narrative exploration.