Editing Rob (The Amazing World of Gumball) (section)

=== Temperament ===
At first, Rob was a relatively friendly and sociable individual, often seen conversing and partying with the other students. However, he got annoyed and argumentative when Gumball and Darwin forgot who he was after he greeted them on the sidewalk. Despite this, he was still willing to help Gumball and Darwin retrieve their CD which fell into the sewer, despite Darwin being the one who kicked him down into the sewer simply to get rid of him. This shows that Rob was a fairly normal, friendly, and forgiving kid, but was still prone to angry outbursts, confrontation, and entitlement.

This personality changed in "The Nobody." After being found in the Wattersons' basement and running away in fear, he later revealed he had no memory of his past life and thus felt like a nobody. He was polite and receptive to Gumball and Darwin who suggested he reinvent himself with a new identity, but was somewhat cowardly, pitiful, and insecure, lost and lacking faith in his own sense of self. When Rob remembered that he was left in the Void, however, he swore vengeance on Gumball and Darwin for leaving him behind, feeling a new sense of motivation in his new identity and became determined to make his mark on the world by enacting revenge. He followed this by becoming a cruel, sadistic, and anarchic individual, often orchestrating hazardous schemes in Elmore while enjoying the thrill and mischief of it.

Although he initially embraced his role as an antagonist out of anger and desperation, he later claimed he "never wanted to be the villain." He revealed his knowledge about his fictional status to Gumball, and asserted that the world of Elmore revolved around him as the protagonist. Because of this, Rob felt forced to become a villain in order to justify his existence, and only played the role reluctantly, claiming he would rather have been a "cute sidekick." Ultimately, he tried sealing Gumball into the Void in order to redefine the universe and his role within it. However, out of remorse, he undid all the damage he caused in this episode, also noting that there would be nothing else for him to do in the absence of Gumball, and that Gumball was hard to hate considering he had saved Rob from the Void.

As a villain, Rob became an extremely depressed and irritable individual who would snap at others and the universe for perceived slights. However, underneath all of this hate and anger is a very traumatized and insecure teenager who experiences existential crisis about the nature of the world he inhabits and his purpose within it, believing it to be a controlling and unjust environment. In addition, he does value the lives of others, as he tried to save everyone from the Void upon its destruction of the universe by transforming them into humans, presumably allowing them to escape into reality. However, his words went unheeded due to his confrontational attitude, cowardice, terrible communication skills, and poor reputation.