Midori is a cruelly mischievous man shrouded in mystery. He seems to have somewhat sadistic tendencies; deriving happiness from teasing and harassing others for his own amusement, even in life and death situations. He enjoys making others uneasy and playing inappropriate jokes on them. He is rather controlling; preferring to cheat or trick in order to stay in the dominant position. His energetic and playful manner of speaking is often completely contrary to the dangerous circumstances of their situation; treating dark topics with little weight.

Spoiler

Midori is the Alias given to him by Sara Chidouin, as his name was being used by Shin Tsukimi at the time.