Zim

Jhonen Vasquez said in an interview that Zim has no canonically definitive age, but he is older than any living human being, perhaps older than any being who has ever lived on Earth. However in Irken years Zim is quite young, although he's not a child or adolescent. Invader Zim is the villainous main protagonist of the 2001-2006 television series Invader Zim, and the main antagonist of the 2019 Netflix film Invader Zim: Enter the Florpus. Zim is a member of the alien Irken race and a former Irken Invader; however, since his actions usually lead to disaster (having nearly destroyed the Irken homeworld during Operation Impending Doom) his leaders, the Almighty Tallest, banished him to Foodcourtia. While there, however, Zim heard of Operation Impending Doom II, and - obviously not understanding the purpose of his previous exile - "quit being banished" and ventured to Conventia in the hope of getting an assignment. Chagrined, the Almighty Tallest sent him on a "secret mission" to Earth, in order to keep him occupied and away from the real Operation Impending Doom II. After arriving on Earth, Zim enrolled in the nearest elementary skool to begin his infiltration and gather information about the indigenous races. There, he became quick rivals with Dib Membrane. Zim's primary desire is to conquer Earth, mostly to prove his superiority and impress his leaders. However, as mentioned by Dib’s younger sister Gaz in "Bloaty's Pizza Hog", "He's so bad at it." As the protagonist, he often has much more screen time than GIR, Dib and especially Gaz. Despite this, Zim is considered a villain morally and ethically. The debate about him being a sympathetic villain is ambiguous because he is seen as evil due his "job" as an Invader, but has been mistreated and ridiculed by his species for almost his entire life, though he is oblivious to their hatred and considers his actions "good for the Empire", despite evidence to the contrary such as obliviously almost annihilating their entire civilization. He usually only causes chaos and destruction for either himself, his own race, or Earth. Despite all this, he occasionally shows some kindness towards certain characters (such as GIR in "Walk of Doom" and "Bad, Bad Rubber Piggy") and Minimoose in "The Dookie Loop Horror", suggesting some affection for his minions. The viewer knows that Zim is an alien, but in the IZ world humans are very blind to this with the exception of Dib and Gaz, who are the only ones that know that he is not from this world.