Ompiach was a Nalroni criminal.

The leader of the Hy'thor pirate group, Ompiach created a leadership council to manage certain affairs. The council was supposed to submit to Ompiach's will, but many council members were also manipulated by the Venithon Twins, who were supposed to obey the council's orders.

Ompiach sent the Venithon Twins to negotiate a treaty with rival pirate Safonne Pendonn, but the meeting ended in a naval battle.