This 18 years old boy is aggressive abrasive and sometimes violent. He has a smoking and drinking habit for which he is chastised by Mitsuki a cops daughter who refuses to let him indulge in either vice while under the age of 20. He flirted with Rei but after hearing her talk to Yuu about her past as a famous hypnotist he immediately exposed her in front of everyone. After the tension in the group has eased Eiji disappears to the bathroom and is not to be seen again until the group reawakens in the mental hospital. Once the real life or death game of quotRabbit Doubtquot begins he is too hasty acts on his own and ends up trapping himself in one of the rooms after going against the groups wishes by using his bar code to unlock a bathroom. As punishment he is left behind in the locked room where the group believes he will stay out of trouble. It is later revealed he was once in a gang that was partly responsible for one of the most violent gang fights in the citys history. Several were injured and one gang member ended up dead by Eijis gangs hands. The deceased is believed to be the lover of someone known only as Shjo H suspected by the others to be Haruka who is out to seek revenge for his murder. When the group learns of this startling new information a possible connection begins to surface. Yuu witnessess his death when he was restrained. Eijis bar code was on his right wrist.