L is a very slim, tall young man with black hair and dark eyes. He has a shadow below each of his eyes, as a result of sleep deprivation. He also has several quirks, such as preferring to crouch rather than sit, eating only sweet foods (Mostly Cake). L tends to second-guess everything he is presented with. He is good at deceiving his opponents, and is willing to take drastic measures to solve a case. L is the world's greatest detective/criminal profiler.
