Barbie is one of the side characters of the Shadows House series. She is a Living Doll working in the house as a Star Bearer and acts as Barbara's "face".

Barbie is generally a jerk to almost everyone. She's very intimidating with her personality and almost feral glare. She will use violence if you do something she doesn’t like. She enforces the rules of the House and is most often seen out of the four Living Doll Star Bearers.

(Source: Wiki)