Kanako

Kanako is the younger sister of the protagonist, sharing a close bond with her older sister Nanako. She harbors a deep attachment to her brother, accompanied by a strong sense of possessiveness. When her brother becomes absorbed in their childhood friend Tsukihi's ASMR content and grows distant from the family, Kanako grows dissatisfied and joins forces with her sister to launch a mission to "win their brother back." In pursuit of this goal, she personally immerses herself in studying ASMR, demonstrating her proactive nature when it comes to taking action for the people she cares about.