Mako Niina (新菜まこ, born April 2, 1997) is a Japanese singer and producer from Kanagawa Prefecture, Japan. In 2017 she performed "Sensen no Realism (戦線のリアリズム)", the ED of "Youjo Senki", and that same year she joined TOKYO LOGIC. On April 28, 2017 she also took part in the "ライブレボルト" project as 白石まどか; after TOKYO LOGIC announced its withdrawal from the project in March 2018, she left the role. From October 2018, she posted on YouTube under the name 音沖まこ（ねおきまこ）.
On June 9, 2020, Niina joined the Sony Music Social Creator label "Be" as 新菜まこ. In January 2021 she became a member of "ONE BY ONE", appeared at the group's live debut in April and remained with it until its suspension of activities on December 31, 2021.
In 2022 she launched the dance and vocal group "アンチテーゼ" as its producer. The group debuted at Shibuya WOMB on July 17, 2022. It later moved to a three-member lineup with 新菜まこ, 七々瀬リタ and 柊あお, and on June 27, 2023 added 渡辺樹莉 before holding more one-man lives at 赤羽ReNY and Zepp Shinjuku in 2023.
