Uni, also known as Black Sister, is one of the protagonists in Hyperdimension Neptunia: The Animation. She acts as the CPU of the nation Lastation and is also the younger sister of Noire. Much like her older sister she is hard-working and a tsundere. She has a inferiority complex to her sister and often compares herself to her. This causes Uni to work twice as hard in the hopes that she will someday be as perfect as Noire.