A well-behaved honor student in the Biology Club at Neris Girls' Academy. Although she is shy and withdrawn, she decided to aim to become an astronaut after being asked by Yukari if she would like to become one. An aptitude test revealed that she had problems with G-force resistance and would pass out if the force exceeded 4G, and she was initially deemed unsuitable. However, her knowledge, thinking ability, and physique met the needs of the SSA, who were looking for a lightweight and small MS (Mission Specialist) capable of boarding a three-seater orbiter, and she was hired in the hope that her gentle personality would help bring together the strong personalities of Yukari, Matsuri, and the other members, increasing the safety rate.