Akane Sawatari is a petite and composed young woman with short blonde hair, dark brown roots, and slit-pupil red eyes resembling a snake. She wears a red oversized hoodie, black shorts, and Nike Airmax 97s. Her tongue is split, and she often hides her bloody fingernails in her pockets, sacrificing parts of her body to her contract with the Snake Devil. Akane is duty-bound and loyal to her allies, with a sadistic streak that enjoys the suffering of her enemies. She also has a fear of being alone.