L (エル, Eru) is a world-renowned detective who takes on the challenge of catching the mass murderer known as Kira. In his investigation, L becomes suspicious of Light Yagami and makes it his goal to prove that Light is Kira.

He also has several quirks, such as preferring to crouch rather than sit, eating only sweet foods (like desserts, candies and fruits) and holding items by using only a thumb and a finger. He also has an unusual way of sitting, with both of his feet on the chair.