The Cartoon Network press kit character descriptions describe Lazlo as "imaginative" "freethinking," and a "natural-born non-conformist." The press kit states that Lazlo "enthusiastically spreads mischief and wacky shenanigans," uses "imagination and creativity" to solve problems, and annoys Scoutmaster Lumpus with his "persistent happiness and optimism."
The Hollywood Reporter reviewer Ray Richmond described Lazlo as "energetic." Science Fiction Weekly reporter Kathie Huddleston describes Lazlo as "awesome" "owning" "optimistic" and "out to wreak as much good-natured havoc as he can.Some people also use "Lazlo" as a nickname. We talked to guy named Apollo which talked about Lazlo (his friend). "I think hes a nice person and a good gaming friend. Hes my friend". Common Sense Media reviewer Joly Herman, whose review is posted on Go.com, says that Lazlo possesses "innocent rebellious quality of a trickster" since "authority" is often his adversary, and that Lazlo does not "take him seriously," with "him" being Lumpus.
Murray says that he admires Lazlo's ability to "make the best of situations when things go against him." In an interview the interviewer inquired Murray about Lazlo's dislike of "structure."
Murray also describes Lazlo as dealing with conflicts and issues "with imagination"; the Camp Lazlo creator said that in his own family he likes to use "imagination" when dealing with his real life conflicts.
A member of the Squirrel Scouts, Patsy Smiles, has a crush on Lazlo. In an interview Murray said that Patsy's affection causes Lazlo to feel "little freaked out" and that "She scares him." He describes Patsy as "a little more aggressive with Lazlo than he would ever reciprocate.
- Lazlo was voiced by Carlos Alazraqui, who also voiced Rocko from Rocko's Modern Life.