Meruru is a fictional magical girl character within the anime series 'Ore no Imouto ga Konna ni Kawaii Wake ga Nai' (My Little Sister Can't Be This Cute). She is the protagonist of the in-universe show 'Stardust Witch Meruru,' which is a favorite of Kirino Kousaka, one of the main characters. Meruru is portrayed as a cheerful and energetic girl who fights evil using her magical powers. Her character serves as a plot device to explore Kirino's passion for anime and otaku culture, and often acts as a source of inspiration and escapism for her.