Shiro, known as Nimbus, is a rugged white tiger beastman whose body is a roadmap of scars earned in the desert arenas of the Kingdom of Sand world- Once a gladiator slave called the "Hellcat of the Dunes," his fierce and intimidating exterior hides a loyal heart, softened by the memory of a human friend. Now an adult wanderer, he relies on his own formidable strength while cautiously learning to trust a new band of companions.