Chiikawa is a Japanese manga and anime series about small, cute characters living in a gentle but unpredictable world, and Usagi is its loud, energetic rabbit friend who often steals scenes with sudden bursts of enthusiasm. Short clips of Usagi's voice have circulated widely on social media and soundboards, where fans reuse them as quick reactions rather than full scenes. Haiyaha has stayed popular because it is instantly recognisable, easy to drop into edits, and fits the same playful energy as other short anime vocal reactions.