One of the titular characters of the series, Osaki Nana may look like a tough punk rocker, but she has a kind heart and is a devoted friend. Abandoned by her parents and raised by her grandmother, Nana was expelled from high school after she was falsely accused of prostitution. Despite these hardships, Nana "polishes the shards of her dreams" and is determined to be successful as the lead vocalist of Blast. She is now engaged to her first love, Ren, although she also has lingering, ambiguous feelings for Yasu. Nana's favourite things never change. Her favorite designer is Vivienne Westwood, and her favorite band is the Sex Pistols. She smokes Seven Stars and likes coffee with milk and strawberry cake. She also has the ability to cook, but prepares all her food with too much salt which only Ren seems to enjoy.