The line comes from Kantai Collection, the Japanese browser game about personified warships that grew into manga, anime and a huge fan culture. Arashio, one of its Asashio-class destroyers, is voiced with a bright onee-san energy, and her gentle 'ara ara' fits the classic ara ara meme that anime fans already knew from countless older-sister characters. Clips of KanColle voice lines circulate as short reaction sounds on soundboards and in edits, and this one endures because the phrase instantly reads as playful and flirtatious even to viewers who never played the game.