In his first appearance his hair is short and hidden under his cap with only triangular bangs similar to Blossom's visible. After his reincarnation, Brick's bangs are hidden under his hat, and he has long, jagged hair.
Brick is crude, gross and violent. Like his brothers, he finds sadistic pleasure in beating and taunting those around him. In his initial appearance his personality was closer to both of his brothers; proud, confident in his abilities and a lust for evil. It is after his reincarnation by HIM that he begins showing a more hot-headed and arrogant side. Like Blossom, Brick is the team leader of the Rowdyruff Boys, but true to form he is much more violent and controlling. Blossom is logical and organized while Brick is short-tempered and reckless. He is overbearing, bossy and vain; he never asks for input and is the final word on any action. Verbally and physically abusive, he is constantly yelling at his brothers for getting distracted or saying something stupid. Despite all this, in Issue 10 of the IDW Comic, Brick was willing to work alongside the girls and the Iron Viking against the Klin Ton without much convincing.
However he is smart enough to recognize both Mojo and Him's own ignorance.