Age: 13

Hikaru is a 13-year-old second-year middle school student who loves stars and constellations. She is a cheerful girl with a full of imagination, but also stubborn and often acts on intuition. She enjoys looking at the stars and writing in her notebook, which through Fuwa's power becomes the "Twinkle Book." As Cure Star, her main technique is "Star Punch", which can be upgraded into stronger variations by using a Princess Star Color Pen. In the epilogue, she becomes an astronaut, fulfilling her promise to Lala. Her theme color is pink.

She introduces herself as "The twinkling star that shines throughout the universe! Cure Star!" (宇宙に輝くキラキラ星！キュアスター！).