Light Yagami and L are often represented as opposites, even to the point that Light uses a PC and L uses an Apple Macintosh.
The theme playing at the very beginning of the pilot is a chanted variation of the prayer "Kyrie Eleison", which is Greek for "Lord have mercy."
Tsugumi Ôba said L is a mix of Japanese, English, and Russian, as well as either French or Italian.
In addition to being a mix of nationalities, L speaks six languages. Although it can't be shown in manga or anime, but L is fluent in Japanese, Chinese, English, Russian, French, and German.
L, Misa, Light and his Father are seen in Ejji obu hevun (2005) outside the barber shop for about 3 seconds. "L" is riding a bicycle (right to left) and "Misa" is on the standing on the right, spying on Light and his father.