Alison Miller said this quote
“ A child who is being abused on an ongoing basis needs to be able to function despite the trauma that dominates his or her daily life. That becomes the job of at least one ANP [apparently normal part of the personality], whom the child creates to be unaware of the abuse and also of the multiplicity, and to “pass as normal” in the real world. The ANP is just an alter specialized for handling the adult world—in other words, the “front person” for the system. ”