Maclain Windows Computus (born January 17, 1999) is the protagonist in Party On. He is known as a teen who struggles in school, and always, I mean ALWAYS gets B's and C's, unlike his friend Jack Jillian, who gets A's and is on the honor roll, he never gets a chance to be on the honor roll.
Mac was born in San Diego, and lived to be a guy who would do the right thing. He is the oldest kid in his family. He met Jack Jillian in Kindergarten in 2004 or 2003, and had been friends since. He became the reigning straight A from 4th grade to 6th grade, as he lost the title to his friend Jack Jillian. He is a street smart, ordinary and awesome 14-year old.