Osial is an ancient god and sea monster that was defeated by Rex Lapis during the Archon War. Zhongli refers to their conflict as an "ancient grudge," suggesting he and Osial had a long-standing enmity for reasons yet known. He’s bitter about this conflict, seeking revenge against Rex Lapis. He wishes to defeat Rex Lapis as he was defeated 2,000 years ago. He has long messy blue hair, blue eyes, white skin, and a blue earring on his right ear. He’s also very tall.