Brick, considered the "leader" of the group is a calm, calculated, conniving kid who uses his brothers as a means to fulfill his deepest desires. Brick is the brains of the group, considered to be the smartest of the three. He's mean, manipulative, and patient. That is perhaps the scariest thing about him. With Boomer, he's an idiot who can barely control his powers. With Butch, he's too stupid to use his powers to their fullest extent. With Brick, he's more than fine with waiting, and plans everything accordingly. He's not afraid to sit around and wait for his enemy to come to him, no, he'll sit in the same spot for hours on end just to have the perfect advantage. And that's why he's the leader of the Rowdyruff Boys, he makes use of his brother's powers vey efficiently.

He's calm, yet commanding. In a sense, every sentence that comes out of Brick typically sounds condescending, almost like he's always talking down to you.

I imagine him sounding similar to Scaramouche from Genshin Impact. Calm, yet assertive.