Dio is extremely irritable, irascible, callous and impatient. He tends to tease and insult people very often, and as a result is very disliked by mostly everyone. He is sadistic, as shown when he gleefully murders Tenmyouji and Clover in the Luna route, and does the same to the old woman, and laughs aloud with joy when he threatens to murder eight others with the bombs. He also tends to say what's on everyone's minds. His real name is Left. From Zero Escape series.