This transformers papercraft is Optimus Prime, from the Japanese/American animated television series Transformers Animated, which based on the Transformers toy line. The finished model stands about 45 cm tall.
A washout from the Elite Guard, Optimus Prime was reassigned to space bridge repair duty under the supervision of Ratchet. He is a relatively naive and idealistic young leader, prone to long-winded "inspirational" speeches who leads a small and inexperienced Autobot space bridge maintenance team. Recently, his crew has landed on Earth, adopted jobs as semi-official superheroes and currently live in an abandoned Sumdac Systems warehouse.
Despite his humble "Bot Next Door" persona, he performs his job with a dedicated seriousness. He transforms into a red truck cab that can be fitted with many kinds of "trailer" attachments and wields a kick-ass, rocket-propelled, extendable battle axe, as well as multiple arm mounted modifications, including grappler cables, fire extinguishers and bola-whip throwers.
Sentinel Prime sneers at Optimus's lowly repair job, and Supreme Commander Ultra Magnus once held the young officer in low regard. More than anything, Prime wanted to be a hero. He's had the speeches, he had the moves...but what was he missing? Maybe The Touch? But since coming to Earth, Optimus has learned the truth about heroism. It's not about glory and destiny, it's about doing the right thing and going to your limit and beyond. Ratchet, for all his cynicism, knows that Prime is a hero, and after seeing him in action, Ultra Magnus himself admitted that Optimus has excellent leadership skills. [Source: wikia]
You can download this paper model template here: