Happy from Fairy Tail is the blue Exceed companion to Natsu, and his cheerful 'Aye' became his trademark agreement throughout the long-running anime series. Fans clipped the short affirmation for reaction videos, memes and soundboards, where its bright, instantly recognisable tone made it easy to reuse for moments of agreement, excitement and celebration. Because the line is so short and character-specific, it still works years later as a quick anime reaction that needs no explanation for fans.