This is a posable action figure from the Nendoroid series.
From the Good Smile website:
From the popular anime "Love Live!" comes a figure of the Idol Research Club President who tries day and night to be a better idol, Nico Yazawa! She has been sculpted wearing her outfit used in the song "Bokura wa Ima no Naka de".
Nico comes with alternate parts that allow her to be posed in her well-known "Nico-Nico Smile" pose, and she also comes with the winking expression seen in the opening theme of the first season! Enjoy the company of Nico in her frilly stage outfit!