Hikaru is an imaginative and curious second-year student who loves constellations and space. She can be rather stubborn too, in which she will investigate anything that interests her thoroughly and acts on intuition. She is also ecstatic and has a tendency to drag people into certain activities she finds intriguing, unaware that her enthusiasm can be disrespectful to others. She is also supportive and caring towards others. Her Pretty Cure alter-ego is Cure Star, the Pretty Cure of the Stars.