Kaede Nankyoku is the younger sister of Sakura "Penguin" Nankyoku, hailing from an immensely wealthy family. She has purple hair styled in twintails with hair ribbons and brown eyes, presenting the appearance of a young elementary school-aged child. Despite her youth, Kaede displays a significantly more composed and mature demeanor than her older sister. She frequently intervenes to manage or correct the chaotic situations caused by Sakura's erratic, otaku-driven behavior. Kaede enforces discipline within the household by sending Sakura to a designated disciplinary space known as "the lecture house" or "lecture room" as punishment, underscoring her role as the responsible sibling maintaining order. She collaborates closely with the family butler, Sebastian, relying on his wide range of skills to assist in managing household affairs and addressing Sakura's missteps. While generally strict and focused on correcting her sister's behavior, Kaede is kind-hearted and caring, demonstrating concern for others. Her intelligence and creativity are evident in her approach to solving problems related to Sakura's actions. Across all media adaptations, including the original manga, its sequel *Penguin Musume Max*, and the original net animation *Penguin Musume Heart*, Kaede's character and role within the family remain consistent, with no significant development, expansion of background story beyond these familial interactions, personal history outside managing Sakura, or evolution in her character dynamics provided.