Ahem embodies the Spirit of the Earth, sharing a fractured marital history with Mii, the Flower Spirit, acknowledged as her former husband until her intolerance dissolved their bond prior to Ongo's sealing. His distinct appearance features a bald head, white hair, prominent eyebrows, and a mustache, typically shirtless with a skull necklace and a traditional crotch covering.

He materializes after Natsumi Rokudo accidentally shatters Ongo's seal, visiting her in a dream to transfer Mii's skull necklace and unlock her transformation into the Flower Spirit. During this encounter, he performs a dance with suggestive movements that activate Nii's protective and transformative powers. Later, confronting Ongo's corrupted state, he impales the evil spirit with his spear.

His abilities revolve around this spear, which destroys evil forces and expands into a pole weapon, alongside rapid location traversal—though one miscalculation stranded him in San Francisco. Beyond the OVA, drama CDs expand his role: he visits Natsumi to recount an apocalyptic future where they ally with Ongo against a monster, and psychically advises Mii during a clash.

Personality notes highlight his perverted dance style and lecherous interactions, influencing dynamics with other characters, particularly regarding the transformative powers he grants. His narrative function consistently anchors him to pivotal evil-containment events and empowering Mii's successors.