Gumball Watterson/Relationships

Darwin
Even though Darwin is adopted, Gumball shares a genuine sibling connection with him. The two boys have a big imagination and like to get into mischief. They get along very well, though they do argue at times. However, Gumball can be a bad influence on Darwin. Gumball sometimes turns his nose up at Darwin's ideas and they both go for a more childish or foolish approach.

Anais
Gumball usually relies on his sister with his own problems. She likes to inform Gumball that she is almost always right and that he is usually wrong. Although Gumball will never admit it, he actually loves and admires his sister and knows that she is right about things most of the time.

Nicole
Gumball loves his mother very much, though he does believe she is terrifying. He often dislikes her need to win. He does not like to admit to wrongdoings to his mother because of Nicole's fiery temper.

Richard
Gumball is seen spending more of his play time with his dad more than his mom, mainly because the child inherits his silliness from his dad and enjoys his company due to it. However, Richard can be tough on Gumball when the situation demands it and completely aloof otherwise. He's also been known to make fun of him sometimes and use their foolishness to his advantage. As seen on an Elmore Stream video, Gumball likes to poke Richard's "weird bit on his belly" when he is unaware of it. Richard reacts strongly to this, making the same "Dah!" noise after every poke.

Penny
Penny is Gumball's love interest. Gumball has a gigantic crush on her, and Penny has one on him as well. He often blurts out professions of love and tries to get away with it either by denying it, hiding it, twisting it, or hoping she ignores it - most of the time in an unconvincing way. They have had 2 kisses on the cheek and whenever they try to kiss on the mouth they're usually interrupted.

Carrie
Carrie is a really good friend of Gumball. In the episode "The Ghost", Gumball allows Carrie to use his body. Towards the end of the episode, Gumball refuses to let Carrie use his body. She becomes angry by this and decides to take it. Gumball convinces Carrie to leaver his body. But from then they remain good friends. In "The Flower", Carrie helps Gumball get rid of his jealousy over Leslie. At the end of the episode, Carrie playfully punches Gumballs arms causing Penny to short Jealousy too. In these two episodes Carrie and Gumball seem to care for each other. In "The Ghost", Gumball helps her at the end and in "The Flower", Carrie helps Gumball overcome his jealousy.

Mr. Robinson
Mr. Robinson is somewhat an idol to both Gumball and his companion Darwin, but mostly to Gumball. He always tries to earn his favor, most of the time failing at it such as in "The Debt" and sometimes actually being successful to convince him like in "The Car," though only for a very minuscule time span. Ironically, Mr. Robinson despises Gumball for irritating him all the time. Though most of time Mr. Robinson despises Gumball's presence, a moment in The Debt actually resulted in Mr. Robinson thanking Gumball for saving his life, but still yells at him for ruining his great performance.

Tobias
Gumball and Tobias have a history of rivalry behind them, although their relationship is somewhat unclear. In "The Pressure," Tobias and Gumball form a no-girls pact and Gumball doesn't uphold it very well. Also, in "The Third," Tobias becomes Gumball and Darwin's friend for twenty dollars, but he ends up ignoring Gumball and befriending Darwin. They also fought for their love interest, Penny, in "The Knights".