Nao

Functioning as a perfect biological duplicate of Sunao Aikawa, this mysterious replica is summoned whenever Sunao seeks to skip her school responsibilities. While she assumes Sunao's identity for the day, she inherits all recent memories, though she only retains details that Sunao finds significant. Beyond her role as a decoy, she possesses a studious and earnest personality, often spending her solitary time immersed in various books.