Age: 15 Height: 148cm Birthday: January 31 Zodiac: Aquarius Blood type: O Hikari Kohinatais the story's first protagonist. She is a student at Yumegaoka High School and is in year 1, class 2. She lives with her grandma at the beach. She loves diving and tonjiru (miso pork soup). She wear a diver's safety whistle on her neck. She likes to give people nicknames. She was the one that decided on "Dotty" and "Cha."