Aye sir is the signature catchphrase of Happy, the flying blue Exceed cat from Fairy Tail, the anime adapted from Hiro Mashima's manga that premiered in 2009. Happy tacks it onto his sentences as a cheerful salute, and fans clipped the shortest, punchiest deliveries into reaction sounds. The line spread through anime soundboards and meme edits as a pocket-sized yes, sitting naturally beside other catchphrase sounds like Tuturu. Its staying power comes from Fairy Tail's long run and Happy's role as the guild's loyal, comic sidekick.