Neptune, also known as Purple Heart in her goddess form, is the main protagonist of the Choujigen Game Neptune series. In her grown-up form, she is more mature and serious compared to her younger self. As the CPU (Console Patron Unit) of Planeptune, Neptune leads her nation and protects it from various threats. She is known for her playful personality, love of pudding, and strong sense of justice. Grown-Up Neptune demonstrates leadership and depth, taking on greater responsibility in the story.