Lullaby, known as Onpu Segawa in the Japanese version, is a renowned child actress and singer celebrated for her widespread popularity among younger audiences. She sports vibrant purple hair and eyes, a deliberate visual motif emphasizing her association with the color. Her signature flute accompanies the spell "Pururun Purun Famifami Fa," blending her musical talents with magical prowess. Introduced as an apprentice to the witch Majo Ruka—who shares a tense history with Majo Rika—Lullaby initially clashes with the protagonists, exuding a cold, enigmatic demeanor. Over time, her arc reveals layers of compassion and altruism, showcasing profound personal growth. The narrative highlights her ability to navigate dual roles as a rising star and a dedicated witch-in-training, underscoring her adaptability. In the Italian adaptation, her name remains Lullaby, preserving the melodic theme echoed in her original Japanese name.