[hider=Appearance][img]http://th01.deviantart.net/fs70/PRE/f/2012/196/9/7/97c996a054a5c61cec5472ee3ec06033-d57b6m5.jpg[/img][/hider]
Alias: Y
Age: 16
Role: Detective
Personality: Y is a strange young boy, whose personality seems to differ quite a bit, but the answer is simple. He's manipulative. He acts the way he needs to in order to achieve a certain goal he has in mind at that moment. If he has no goal whatsoever, he acts friendly and kind, trying to give off a "nice kid" impression. He's uncannily intelligent though tends to humour the rather "stupid" people around him so that they don't think he's much of a threat in any way. When he's being genuine, he's nice enough to be around but he's annoyingly cocky and prideful about his intellectual prowess. He studies Holmesian thinking but also focuses on the way a person speaks or acts to deduce what he's looking for. 
Why he/she took the Kira case: Y has always been interested in challenging mysteries, justifying this interest with the singular term "Flow".
Other: He's quite interested in psychology and the human brain. Other than that, he loves playing games like chess and reading mystery books.