A

A is mentioned briefly once in the book Death Note: Another Note. A was the original successor to L and lived at the orphanage known as Wammy's House. A committed suicide after the pressure of having to succeed L became too much for him to handle.

Trivia

 * In the film L: Change the WorLd, A's name was not seen on L's computer screen.
 * A is mentioned only once, in a single line on page 105 in Another Note.
 * "The first child, A, was unable to handle the pressure of living up to L and took his own life, and the second child, Beyond Birthday, was brilliant and deviant."