Alan Keane is a supporting character in The Amazing World of Gumball series.
Alan is an optimistic teal colored balloon who likes to make the world a better place. He attends Elmore Junior High as a student, where he achieves good grades and tries to bring the best out of his fellow peers. Alan is currently dating Carmen, a green cactus who also attends the same school.
Alan is voiced by Kerry Shale in season 1. He is later voiced by Hugo Harold-Harrison from season 2 and onwards.
Alan is considered to be "perfect;" he has got good looks, friendly demeanor, and a nice attitude. He has a high-pitched voice, mainly because he is filled with helium. Alan sacrifices himself selflessly in the need of other people and seems to always have the positive outlook on things regardless of how negative they might appear to other people. Even though many people congratulate Alan on his deeds, almost everyone at Elmore Junior High is disgusted by his relationship with Carmen.
Alan's do-gooder personality annoys Gumball so much that in "The Saint," Gumball sets out to prove Alan has a dark side by any means necessary; true to his record of selflessness, Alan eventually pretends to be extremely annoyed by squeaking footsteps simply to appease Gumball. However, Gumball was later proven right in "The Vision," in which Alan is revealed to have extremely manipulative, egotistical and power-hungry inner thoughts. He can outright take advantage of people's vulnerability to rise in power. The episode also shows his intense hatred for sad people and the evil things he plans to do with them in his "Happy Camps."
Despite being a complete do-gooder, he seems to enjoy Gumball and Darwin fighting in "The Apology," claiming the bout would be better with poison nunchucks.
It is revealed in "The Faith" that if Alan loses all faith to make the world a better place, the world will become black and white and lose its color, implying that Alan is a very forgiving and understanding person, as despite how often things go wrong for him and the rest of Elmore, he still has a lot of faith in the world.
Despite that other students don't care and they spit on his kindness, he is always willing to do the right thing.
Even though other students get annoyed by him and even want him dead sometimes! But that's only because they don't know his heart.