Kondou materializes unexpectedly during Lily's encounter with the Frog King in Frog Land. He declares himself a man fated to be reborn as Lily's younger brother the following year, an unexpected familial consequence directly tied to her impulsive wish for her parents' divorce, made at the Frog Castle amidst frustration over their arguments.

When Lily rejects his claim of their future sibling bond and flees, Kondou actively pursues her through Frog Land. This immediate chase escalates into a physical struggle culminating in both tumbling headfirst into water, intensifying the tension surrounding his sudden appearance and declared purpose.

His core objective centers on persuading Lily to reconsider her divorce wish. He frames his very existence as contingent upon her decision about their shared familial future. Kondou's background prior to manifesting in Frog Land remains unspecified. His entire narrative presence begins and concludes within this single encounter, his final depicted moment being the fall into water with Lily. He wears a suit; no further physical characteristics are described. His motivations appear intrinsically linked to Lily's wish and the Frog King's magic, though the precise nature of his connection to the Frog King's powers remains undefined beyond his stated rebirth purpose. The outcome of his attempt to sway Lily's perspective regarding her parents remains unresolved following their plunge into the water.