This TMNT mini papercraftis the Donatello, created by Gus Santome. Donatello (Don or Donnie) is a fictional character and one of the four main characters in the Teenage Mutant Ninja Turtles comics and all related media, he sports a purple bandana.
His signature weapon is the bō staff. In all media he is depicted as the most knowledgeable of the four turtles, often speaking in technobabble with a natural aptitude for science and technology. He is the second youngest brother out of the four. He is named after the sculptor Donatello.
You can download this mini Teenage Mutant Ninja Turtles (TMNT) papercraft from here: Teenage Mutant Ninja Turtles (TMNT) – Donatello Mini Papercraft Download