Chinatsu Hayase

Meet Masamune's little sister, a spirited second-year middle schooler with a knack for standing out. Even though she goes by a different last name—thanks to Masamune’s choice to switch from Hayase to Makabe—she's no less memorable. Picture her buzzing around school, juggling classes and friendships with a sparkle in her eye. She's got that perfect mix of mischief and charm, always ready for an adventure, even if she doesn't share her brother’s name. With a personality that's as vibrant as her backpack, she’s determined to carve her own path while still cheering for her big brother from the sidelines.