Natsumi Suga (須賀 夏美, Suga Natsumi) is a university student who works at a small editing studio and one of the three tritagonists of Tenki no Ko.
Natsumi has long brown hair, purple eyes, and long eyelashes. She usually wears casual cleavage clothing that expose her arms and legs. She also wears nail polish, and wristbands.
Natsumi is a carefree and mischievous young woman who enjoys teasing others, as she enjoys watching Hodaka squirm when she guessed correctly that he was staring at her chest. Despite this, she is kind, caring and loyal, keeping her uncle company, warning Hina Amano about the risks of being a sunshine girl, and helping Hodaka Morishima find Hina despite his status as a criminal. She's a fan of urban legends and all stories supernatural, contrasting to her uncle and Hodaka who only seek them for monetary gain.
She is named from the Japanese word 夏 (natsu) meaning "summer" and 美 (mi) meaning "beautiful". It can also come from 菜 (na) meaning "vegetables, greens" and 摘 (tsumi) meaning "pick, pluck or sin".