Village Chief Omuna leads Hakum Village, a secluded community where humans and monsters coexist peacefully through the Rider tradition. He is an elderly Wyverian of short stature, distinguished by a large mound of facial hair, prominent eyebrows, and a topknot hairstyle. He typically wears a purple robe over an orange shirt and carries a traditional staff decorated with a large blue crystal and bells.

As chief, Omuna oversees the Kinship Rite, the ceremonial initiation bonding Riders with their Monsties. He upholds Hakum's isolationist policies, protecting its Rider culture from external hunter societies that view monster bonding as taboo. Yet he shows flexibility, permitting proven individuals like Lute to venture outside. His leadership blends wisdom with approachability. He speaks playfully, often using rhymes in daily conversation, maintaining a kind yet authoritative presence. When villagers, especially younger ones, break rules—such as entering forbidden forests—he usually responds with warnings rather than harsh punishment, reflecting his understanding nature.

During crises like the violent Black Blight outbreak affecting monsters, he supports the village's defense and endorses younger Riders' missions to confront the threat. His decisions prioritize both village safety and the preservation of Rider values, emphasizing forming bonds with monsters over destroying them. No significant personal backstory or evolution across media is detailed in the available sources.