Stewie is a simple man. He loves to do anything that involves absolutely nothing. He talks slowly and has a deeper voice, but still a teen His voice should be kinda goofy too. He has a voice of what I like to call a sans voice, which is a character from undertale. Look up sans' voice if you haven't heard it to give you a better idea. But remember to keep him sounding like a teen :p He is the older step-brother of Doug.