This is a posable action figure from the Nendoroid series.
From the Good Smile Company website:
From the popular PC game "DRAMAtical Murder" comes a Nendoroid of Clear! His trademark gas mask is included but can also be removed to reveal his face, and he even comes with a smaller version of the mask to hold in his hands while not wearing it!
He also comes with three different expressions for when his face is revealed including his standard expression, a disheartened expression as well as a smiling expression to respond to his 'master' Aoba! He also comes with a vinyl umbrella as an optional part. Enjoy recreating all sorts of scenes from the series!