Coach Z is the eccentric "coach" of the residents of Free Country, USA, though it is unclear exactly what he coaches. He has a strong Upper Midwestern accent, which sometimes gets him into trouble and is thought to be fake, and frequently mispronounces words to increasingly ludicrous degrees. He almost never says anything negative to anyone, and he often offers more encouragement than is needed. He wears a blue and purple baseball cap and a large gold "Z" emblem around his waist, but it is unclear whether his bright green color is his skin or a body suit.
Coach Z also seems to have mental and gender confusion problems, as evidenced by his time spent "talking to his parents" on a disconnected telephone and claiming to be a mother. He has even stated on one occasion that he sometimes "forgets what's real, and what's just in [his] head". He also has trouble managing his money, causing his electricity to be shut off one year. He is quite lonely and has an unrequited crush on Marzipan, very often making inappropriate romantic gestures to her, especially on her answering machines. He is very fond of hip-hop and often refers to it in conversation. He is also an aspiring rapper, recording several songs, including "These Peoples Try to Fade Me", "Hip-Hop Dance", "Rap Song", and "Fish Eye Lens (ft. Strong Bad)".