Tobias Wilson

Tobias is a student in Miss Simian's class at Elmore Junior High. His first appearance was in The Third, when he became Darwin's friend for twenty dollars. He is voiced by Rupert Degas.

Personality
Tobias is a rainbow creature. He thinks he's heavily built, but he's actually quite small, as shown in The Pressure when he couldn't even cut his skin with a stick. He's obsessed with sports and is always trying to find new ways to hone his physique. He can also be somewhat of a bully, as shown in The Quest, where he throws around Anais's stuffed animal, eventually dropping it out of the moving bus. He is also greedy as shown in The Third, where he charges Gumball and Darwin twenty dollars for his friendship.

Rachel
Rachel is Tobias' older sister. They are very hostile to each other - Rachel screams at him and his friends that they aren't invited to her party, so Tobias has to blackmail her into inviting them.

Penny
Like Gumball, Tobias has a crush on Penny. This occasionally causes tension between the two, but unlike Gumball, who is shy around Penny, Tobias is more confident in his abilities to woo her.

Banana Joe
Tobias seems to be pretty good friends with Banana Joe. In The Pressure, he spends a lot of time with him, and together they formed a pact along with Gumball and Darwin, promising to put their "pals before gals". When Darwin breaks this pact, he accompanies Banana Joe in chopping down the girls' treehouse to save Darwin from kissing Masami.

Gumball Watterson
In The Third, he becomes Darwin's and Gumball's friend for twenty dollars (which Gumball paid), but ignored Gumball and only hung out with Darwin. When Gumball and Darwin reunite at Tobias' house, Tobias asks if he can play with them, to which both of them respond "No". In The Quest, he ignores Gumball's threat and tossed Anais's stuffed animal out of the bus's window. And in The Pressure, he forms a "pals before gals" pact with Gumball, Darwin, and Banana Joe.

Darwin
Tobias was a good friend to Darwin in The Third, but this may have been because he was paid twenty dollars to do so (from Gumball, who he ignored). He also went out of his way to save Darwin from kissing Masami by helping Banana Joe chop down the treehouse.

Rob
In The Party, Tobias hung out with him throughout the entire party. Rob is probably Tobias' good friend.

Trivia

 * Tobias is rich, so it is unknown why he would have people pay for friendship, unless he is greedy.
 * He may be related to Masami because they have stuff that are puffy but he has colors meaning he might be the son of a worker for The Rainbow Factory.
 * It's possible that he and his sister are multicolored because their headbands cut off circulation.
 * He is a child character in the series who is voiced by an adult.
 * His name and Rachel's are likely an allusion to two of the characters from the Animorphs series.
 * The upper part of Tobias' head, which sticks out of the headband he wears, is shaped like a four leaf clover.
 * Wearing the headbad may be a family tradition, as Tobias has one, Rachel has one, and their mother has one.
 * Tobias could be a colorful cloud or a living blob of cotton candy. However, it is more likely that he is a cloud, not cotton candy.
 * Tobias placed 1st in the Dumb Race and is officially the dumbest person ever.