Nappa is an elite Saiyan warrior from Planet Vegeta, and Vegeta's partner in combat. Prior to the destruction of Planet Vegeta, Nappa was the General of the Saiyan Army under the Galactic Frieza Army and aid/partner to the young Prince Vegeta as well. After his race's demise, he, along with Vegeta and Raditz, work as soldiers directly under Frieza, which leads him to Earth. His name is a pun on a type of Chinese cabbage.
Nappa has quite a destructive personality and loves demolition to an extreme level. When arriving on Earth, the first thing he asks Vegeta is if he can destroy a town. When taking time off to wait for Goku, Vegeta allows him to destroy as many things and places as he wants, as long as he does not waste enough energy to break a sweat. Nappa proceeds to demolish an entire Navy fleet division as well as an aerial raid, smashing through many jets and helicopters before leveling a slew of ships. Despite this, however, he usually congratulates his victims when they utilize attacks that come close to killing him, as evidenced when he congratulates Tien Shinhan on his use on a Spirit Tri-Beam that shattered his Battle Armor, citing that, had his aim been better, it would have severely injured him.
Nappa also has a very cocky personality, as he enjoys toying with his opponents. Nappa is rather sadistic, delighting in the suffering and pain he inflicts upon his opponents. His sadism is strongest by far towards Goku, and he repeatedly voices the intention to kill Goku's friends and son before his eyes as revenge for his treason towards his own race. He tends to fight first and makes use of his brawn more so than his brain. However, his great ego would immediately vanish the second someone causes him a bruise or scar, and would decide to kill them slowly and painfully as a result. He is, in this instance, vain to the extent that he feels his appearance should remain unscathed. However, he would still eliminate anyone as quickly as possible when losing patience with them.
Oftentimes, he allows his anger to get the best of him, becoming extremely enraged and infuriated and unable to think properly, which results in Vegeta constantly reminding or, in some cases, ordering him to calm down. Whenever Vegeta tells off Nappa for acting asinine, or not listening, Nappa apologizes to Vegeta, usually in a slightly fearful state, and then proceeds to claim he was not thinking straight, showing his respect for Vegeta. In the Japanese dub, Nappa normally addresses Vegeta in a casual manner. In Bardock - The Father of Goku, this is alluded to be Vegeta's preference when he orders Nappa to "quit bootlicking". However, whenever chastised by Vegeta, he always addresses him with very polite language, as one would normally address a superior. It is only when Vegeta decides to kill him that Nappa abandons all respect for him, even calling Vegeta a "dirty rat" and challenging him in Dragon Ball GT. An anime-only flashback in the Frieza Saga, shows a more sympathetic side to Nappa. He appears to be shocked when Vegeta claims not to care about the death of his father and the rest of the Saiyan race, and his overall dialogue seems to imply that he does not kill when there is nothing in it for him. Also, when Nappa and Vegeta learn about the Dragon Balls and their wish-granting capability, Nappa's first suggestion is to bring Raditz back to life, demonstrating that despite his ruthlessness, he cares for his friends and comrades.
Nappa seems to be very knowledgeable about Saibamen; he knows how to grow them and seems to enjoy planting them. He even shows some slight compassion for them, as he is shocked when Vegeta kills one of their own after it failed to kill Tien. He is also shown coaching the Saibaman who fights Yamcha and is angry that its fight ends in a draw, saying that settling for a draw is pathetic. After Krillin and Piccolo kill the four remaining Saibamen, Nappa begs Vegeta to let him kill the five remaining Z Fighters. In Dragon Ball Z: Budokai 3, Nappa has unique opening dialog when fighting a Saibaman, commenting that the Saibaman grow well in the soil. [Source: wikia]
About the Dragon Ball paper model:
Size: 33 cm
Format: .pdo line + lineless
You can download the papercraft model here: Dragon Ball - Chibi Nappa Free Papercraft Download