Neko Fujinomiya is a cute and cheerful rich girl who transferred school after Makabe "gave her his coat on Christmas Eve" and fell in love with him. She has a frail body, needing to consume many drugs although she often makes jokes about it. Due to her habit of not wearing any panties, Aki and Yoshino nicknamed her "Pantie-less Woman".
While claiming that she just needs Masamune to pretend that their first encounter were real, Neko is actually genuinely in love with Masamune when he's still chubby, although it is never revealed how. After Masamune rejected her, Neko's condition got worse and she underwent a surgery abroad, and then came back with better health and thus continue to support Masamune.