Case Study: Alias

L is his main name and alias in the Death Note series. "L" is also renown as the no. 1 detective in the world.

Ryuuzaki is his alias in Japan (and between the Japanese police).

Ryuuga Hideki is the name of a celebrity he used to enroll in the school to get near to Light.

Erald Coil and Danuve are the other top detectives, which are also L.