Brian, the family dog is Stewie's best friend. Every adventure Stewie goes on, he takes Brian with him. They are defianantly compatible as both have an unatural talking compality. Brian is also the only one who understands Stewie, other than Stewie's brother (Chris) and other babies.
Brian Holding Thumbs up
2. Peter
Peter is Stewie's father. Stewie does often get annoyed by his father due to his stupidity, but enjoys his company non the less
Peter doing his iconic "bird" dance
3. Chris
Stewie's brother, who is often helped by Stewie in order to pass his classes in High School. Chris has the capability of understanding Stewie, something not everyone has
Chris jumping for joy
Lois is Stewie's mother. Stewie despises her because she does not perceive his overwhelming intelligence and constantly foils his plan while tending to typically motherly duties
Lois delighted to see Stewie, much at Stewie's chagrin
2. Olivia
Olivia is Stewie's ex-girlfriend. Olivia constantly gets involved in Stewie's life even though he does not want her to be apart of it. She often foils Stewies evil plans
Stewie in a fight with Olivia
3. Meg
Meg is Stewie's sister. Stewie despies Meg and is not alone, as the rest of the family despises Meg also. Meg constantly tries to spend time with Stewie, which he wants no part of
Meg being Meg (gross)