Riku was a Gafna (a rodent-like Rahi) created by member The Original Munki. Aktamu's pet Gafna, Riku was a loyal and helpful, if sometime a bit temperamental, companion. He was often lazy, but the promise of a delectable madu fruit was likely to persuade him to do anything. In a battle with the Dawn on Po-Isa, Riku threw himself in front of a dagger thrown by Nin, which would otherwise have killed one of the Dusk. The dagger pierced his heartlight, killing him.