This papercraft is Slouchy (original French name Schtroumpf Molasson), one of the main characters of The Smurfs cartoon show, who has appeared on the show from Season 5 to Season 8, the paper toy is created by Paper Mike.
Like Nat and Snappy, he was an adult Smurf who was de-aged by a magical clock Father Time had owned, and had since lived among them and Sassette as Smurflings.
He is a rather slow Smurf with a more laid-back personality than the other Smurfs he usually associates with. In his Smurfling form, he is identified by a Smurf hat with its flopped top portion facing sideways, plus a red baggy shirt and a pair of sneakers. He is only Smurfling in the group who likes vegetables.
Slouchy is seen being the one with the "tired look" and is always leaning aginst something with his hands stuffed in his pockets. He is a possible reference to the "calm" kids who just sit back and look cool while everyone else is being loud. Whenever someone is yelling (ex. When Snappy and Nat were fighting with Brainy), he's just staying quiet.
Slouchy does get irritated with the others if they do nothing but fight and has shown to dislike how he is shorter than the others just because he slouches a lot. [Source: wikia]
About the paper model:
Size: 25 cm
Format: .pdo, line + lineless
You can download this papercraft model here: The Smurfs - Slouchy Smurf Free Papercraft Download