Chiaki Komatsu

She is Mayuko's classmate and friend in cram school. She wears glasses, hairpins, wrist accessories, and badges. Always carries her laptop with herself, decorated with stickers. She is not as a good student as Mayuko, and she regularly skips the day when the exam results are announced. She's an alien fanatic, loving everything related to aliens, such as Niea, her UFOs, and the mothership. She is the webmaster of an alien fanatic website and is an avid blogger. She is cheerful, and has a more positive attitude towards life than Mayuko. She mentions her allowance and that she doesn't have a job. We see her organizing a matchmaking event, where Mayuko is invited too.