This is a posable action figure from the Nendoroid series.
From Good Smile Company:
From the anime series "Little Witch Academia" comes a rerelease of the Nendoroid of the unidentified witch and Akko's roommate, Sucy Manbavaran! She comes with three face plates including her standard languid expression, a scheming expression as well as an entranced expression for when she has a few too many shrooms.
Optional parts include her wand, two mushrooms as well as a flask and sprout parts for her to play some pranks on Akko! In addition, she also comes with the "The Sucy that Wants to Spit on the World" a bonus extra part! Be sure to display her together with the previously released Nendoroid Atsuko Kagari for all sorts of fun displays!