Rika Furude's nipaa is one of anime's most recognizable catchphrases, originating in Higurashi no Naku Koro ni, the horror visual novel series by 07th Expansion that became a 2006 anime. Rika punctuates her sentences with the chirpy sound while tapping her cheek, a habit that turned her into a fan-favorite mascot of the franchise. Clips of the phrase spread through anime forums, AMVs and reaction compilations, and it now sits alongside tuturu as a go-to cute anime soundbite that editors use to signal mischief or joy.