This is a posable action figure from the figma series.
From the Good Smile Company website:
Popular virtual entertainer Kaguya Luna is now a figma!
The smooth yet posable figma joints allow you to act out a variety of different scenes.
A flexible plastic is used in specific areas, allowing proportions to be kept without compromising posability.
She comes with four face plates including her smiling expression, her closed-eyes smiling expression, her apathetic expression and her shouting expression.
Three different text plates are included.
An articulated figma stand is included, which allows various poses to be taken.