Not to be confused with Bret Strand.
Brett is a male canon character in Daria.
Brett makes his only appearance in "Daria Dance Party". He and his brother Brad goes to Cumberland High, they attend the Lawndale High dance portrayed in the episode, where they try to woo Daria and Jane. Their easy-going cynicism and sarcasm gets them pretty far with the girls, until they reveal themselves as Upchuck's cousins. Brett looked less bothered than Brad when Daria and Jane fled from them.
They seem close to their cousin, who Brett calls him "Chuck", turning up to see his DJ act & hang out with him afterwards. They also knew who Daria meant when she called him "Upchuck" and showed no reaction to it. Brett can emulate Upchuck's "rrrRRR" perfectly.