Johnny

Johnny (ジョニー, Johhny) is an imaginary character that is representative of Senpai's sex-drive. When sick, Johnny is able to break down the reason for Senpai's mind and overtly increase his sex-drive beyond reasonable limits. This makes it extremely difficult for Kurokami no Otome to take care of Senpai's illness.

Appearance
Senpai imagines Johnny as a cowboy who wears a yellow shirt and hat. He's drawn like a children's cartoon consequently pointing out to the viewer that he's imaginary.

Personality
Johnny is shown to be loud, outspoken, and extremely short-tempered.