Nina Utashiro (歌代ニーナ) is a Japanese-German rapper. She had previously worked under the alias Thirteen13, but began releasing music under her real name in May 2021 with the single ARIA. Almost a year later, she returned with the tracks ÉTUDE and HYMN, in preparation for her debut EP OPERETTA HYSTERIA, slated for a July 6th 2022 release.

Nina was born in 1994 and raised in Tokyo until age 16 when her parents divorced. She then moved to New York with her mother, eventually studying at Columbia University and thus returning to Japan age 21. She founded an independent magazine PETRICHOR in 2018 and released her first project under the Thirteen13 monicker, OMNIPRESENT, later that year.