Mono is a character exclusive to the mobile video game The Seven Deadly Sins: Grand Cross, an adaptation of the manga/anime series The Seven Deadly Sins. She serves as an antagonist in the game's limited events.
She is voiced by Ai Kayano.
Hailing from another world, Mono's past is enigmatic. She is an artificial human, created for the sole purpose of fighting and warfare. Kept in the laboratory where she was made, Mono sought freedom to go and kill and fight as she pleased.
Later, in the world of Brittania, Lilia is captured by Merlin, so her teammates Valenti and Eastin Anamabyllis summon Mono to help free her. Though she takes some convincing, they sway Mono over to their cause, and together they free Lilia. Mono joins the Seven Disasters and fights the Seven Deadly Sins as Lilia prepares.
Mono rarely demonstrates emotion, and is usually expressionless and unfeeling, even in combat. She is compared to Gowther, with both of them being artificially created beings that are incapable of understanding emotion and instead rely on reasoning and logic.