Hoshino, Kyuutarou
Summary
Kyuutarou Hoshino is the younger sibling of Hachirota, sharing a deep fascination with space exploration. He dedicates the majority of his time to building a functional miniature rocket, aiming to demonstrate his technical prowess in this specific area. His dynamic with Hachirota is fraught with tension, as he frequently exhibits open disrespect toward his older brother. However, Kyuutarou undergoes substantial personal growth throughout the narrative, a transformation that accelerates significantly after his interactions with Yuri Mihailokov.
