Nagi Kodachi

As Kyoutarou’s somewhat abrasive neighbor, this perpetually lethargic girl serves as a constant, watchful presence in his life. Despite her apparent lack of motivation and unfriendly demeanor, she takes it upon herself to monitor his behavior closely. She frequently issues stern warnings regarding his interactions with the girls in his circle and his ongoing complications with the Library Club, acting as an unexpected, albeit grumpy, moral compass.