Mana Natsukawa

As the second daughter of the distinguished Natsukawa household, Mana was entrusted by her father to keep a watchful eye on her half-sister Mashiro's activities in Japan. Though she outwardly clashes with Mashiro—often trading sharp words—she secretly holds her in the highest regard, treasuring her like a dazzling gemstone. Beneath her competitive, tsundere exterior lies a genuine innocence and a quiet longing for connection, both of which gradually surface through her growing bonds with Ruita and the others around her.