Bluey is a Slime Monster Girl with a half transparent blue body made of flexible slime, allowing her to change into many forms, her default form having a slim build with a large chest and wide hips, long liquid-y hair, and blue eyes. Having a amorphous and gelatinous body somewhat makes her appear as if she is melting, a small pool of slime always at her feet. Bluey has low intelligence and a simple, instinct-driven brain. However docile they may appear, they love attaching themselves to men.