Wirt is the main protagonist of the show, Over the Garden Wall.
Wirt is a relatively tall and rather thin boy, with a red pointed gnome hat made from an old Santa hat. His outfit consists of a navy blue cape with yellow buttons, simple grey pants that reach his ankles, suspenders, and a classic buttoned up white shirt. His hair is dark brown with pointed bangs that cover the majority of his forehead. He has large ears, a pointy nose and and big, round eyes with black pupils. He wears two different types of shoes, his left shoe being dark gray/brown and the other being black. They are commonly left untied, a noticeable trait throughout the series.
In the episode Into the Unknown, it is revealed that Wirt's outfit is merely a Halloween costume. His normal attire consists of an earth-toned sweater that he wears over a collared white shirt and ordinary gray slacks, possibly the same pants that he wore with his costume. Without his hat on, Wirt's hair takes on a rather messy appearance.
He is a teenager who views the world in a serious way, unlike his little half brother Gregory. Wirt is usually stubborn and makes a point of being in opposition to the other's suggestions, which usually leads them in trouble, and blame his brother for their misery, and while this is partially true, Wirt only bears the title of a leader, as he doesn't have the capabilities yet. He is, most of all, a typical teenage boy with worries of his own.
Wirt is a pessimistic realist in many ways, but also has a naïve and childish side to him. He is easily scared and surprised, and even though he is far more perceptive than his brother, he is very much still a kid. Throughout the story line of Over the Garden Wall, Wirt has to struggle to remain optimistic against impossible odds. In chapter eight, Babes in the Woods, Wirt finally begins to succumb to his hopelessness and gives up on the notion that he and his brother will ever escape The Unknown. His tendency to think negatively is what made him an easier target for the Beast to drag down into despair. Wirt's brother, Gregory, is a parallel of his brother that pulls out the playful, jovial, childlike side of Wirt.
In chapter 9, Into the Unknown, Wirt is shown to have low self-esteem and that he perceives himself to be an outcast, possibly due to his more sensitive interests like poetry and interior design. He tells Greg that he cannot enter the Halloween party because he was not invited and that his crush Sara is interested in Jason Funderberker, a terribly awkward yet good-natured boy whom he considers a threat. However, both of these statements are later shown to be false— a result of his insecurities causing him to distort the reality.
Wirt seems to be the type of teenager that makes out everything to be worse than it actually is, as shown in chapter 9 multiple times; his overreaction to Greg giving the tape to the girls during the football game, the fact that Sara's friends and everyone at the party seems to know him and consider him a friend (despite his belief that he is a social outcast), and his meltdown over the cassette tape unintentionally falling into Sara's possession. He claims that his life is ruined when this happens, blames Greg, and refuses point-blank to simply talk to Sara about his feelings, which ultimately further complicates both his interactions with her and his eventual predicament in the Eternal Garden. It is demonstrated in his confrontation with the Beast that when Wirt critically analyzes his predicaments and remains considerate of others, he is able to calmly and confidently reach a solution, whereas before he was so overwhelmed with anxiety and uncertainty that coming up with worse-case scenarios was but the only thing he could do. In these situations Wirt was prone to lethargy, melodramatic, displaced anger and a tunnel vision focus on his problems.
By the end of the series Wirt seems to have matured, having found the strength to stand up to the Beast and escape the Unknown while also having accepted his responsibility as a brother.
- Although he's older, Wirt is afraid of many things, and prefers to be by himself. However, he has Gregory to look after.
- His secret passions are playing the clarinet and poetry.
- In Songs of the Dark Lantern, it revealed that he and Greg are half-brothers.
- Wirt is somewhere inspired by Adira from Rapunzel's Tangled Adventure.
- In one of concept art Wirt's original name was Walter. This may be unintentional, but his name makes a pun out of the phrase 'Worry Wart', aptly capturing Wirt's disposition.
- Wirt can play the bassoon quite well, as shown in "Lullaby in Frogland".