Mono is the main protagonist of Little Nightmares II, a dark and atmospheric puzzle-platformer game. Shrouded in mystery, Mono is a young boy who wears a paper bag over his head, concealing his identity. Throughout the game, he journeys through a distorted world filled with monstrous adults, working closely with Six, the protagonist from the first game. Mono's courage, resourcefulness, and determination help him overcome numerous obstacles and reveal the unsettling truths that underpin the world of Little Nightmares.