L is said to be very strange and holds the Earthlings with high curiosity, but is very friendly to them. He is also somehow well-versed in proverbs and a connoisseur of historical facts though he often uses inaccurate renditions of human idioms and phrases. Curiously, he refers to himself as if he were more than one person, using plural words such as "we" instead of "I" when speaking in the first person.

his species is stated to be unknown. He has light turquoise skin and horns.