Niya Yamada is a main character in the anime and manga series To-y. She is a 15‑year‑old middle‑school student living in Tokyo. Niya is the best friend and lover of To‑y Fujii, the lead singer of the underground punk band GASP. The two find comfort in each other as they are both shunned by mainstream society. Niya is openly devoted to To‑y, introducing herself as his aijin (lover), which creates tension with To‑y’s cousin Hiderow Koishikawa, who also has romantic interest in him. Niya is portrayed with feline‑like traits, adding a playful and mysterious quality to her character. She is a regular presence at GASP’s performances and social gatherings, and her unwavering support for To‑y is a steady emotional anchor amid the pressures of the music industry. While not a musician herself, her role in the story is that of a loyal confidante whose relationship with To‑y deepens as he navigates the struggle between artistic integrity and commercial success.