Duo is Duolingo’s iconic green owl and the face of the world’s most popular language learning app. Equal parts charming and chaotic, he’s known for his streak reminders, viral TikToks, and most recently, faking his own death to get people to do their lessons.

Since 2012, Duo has done whatever it takes to keep learners engaged—whether that’s chasing them down for missed practice or showing up on red carpets. He’s been featured in memes, news headlines, and even Super Bowl coverage, becoming a pop culture figure in his own right.

Love him or fear him, one thing’s clear: Duo is always watching… and he really wants you to do your lesson.