This is a posable action figure from the Nendoroid series.
From the GoodSmile website:
From the popular anime series "Arpeggio of Blue Steel -Ars Nova-" comes a Nendoroid of the Mental Model, Iona!
She comes with two expressions including her gentle standard face as well as a the smiling expression from the final battle. Optional parts include the 'data rings' that can be displayed around her, sitting parts and even a starfish! The sitting parts allow you to display Iona as if she was sitting in the bridge!