First appearing in episode 62, Hikaru was an idol-in-training that was assigned to learn under Kirari's wing. Initially, Hikaru resented Kirari's influence, but later learned to admire her optimistic nature. Kirari and Hikaru later team up to form the idol unit Kira☆Pika, but the pair was shortly disbanded. Hikaru continues her career as a soloist. Her childhood friend is Wataru.