Fenneko is the fennec fox coworker in Aggretsuko, the Netflix animated series that follows red panda Retsuko through office life. Known for her sharp observations and dry humour, Fenneko often delivers her lines with a knowing, teasing tone, and her distinctive troll laugh became a favourite clip for editors. Shared widely as a green screen and soundboard sound, it spread through meme edits and short-form videos where creators needed a quick way to signal mockery or a joke landing. It endures because the laugh is instantly recognisable and works without any dialogue or context.