Comet-san

Often called "Comet-san", Comet is a bright girl around 12 years old who is very kind to everyone. Although she is the princess of the Harmonica Star World, Comet seems to ignore her high status and would rather play with little stars than meet everyone's expectations by marrying the prince of the Tambourine Star World. After the prince disappeared, Comet was sent to Earth to find him, but in truth, Comet just wants to go to Earth to have adventures like her mother did when she was younger.
Comet cares deeply for everyone; her gentle nature makes her easy to get along with, and people can't help but like her. She also enjoys helping others whenever they need help and will never stop lending a hand to her friends. Even though Comet is very mature for her age, she has a lot of lessons to learn in life. Comet is also inexperienced with feelings she has never felt before, which is why it takes her a long time to realize that she is in love with Keisuke. In the end, Comet returns the memory stone, which the prince dropped on the day he ran away to Earth, and she ends up going back to Earth.