All Around the Town2002

Justin Donnelly:
Your sister's manifesting a condition called dissociative identity disorder, DID for short. It means she has multiple personalities.

Sarah Kinmount:
What?

Justin Donnelly:
There's nothing to be afraid of. In fact, it's quite remarkable. A child powerless against abuse often creates other personalities or alters to survive the trauma.

Sarah Kinmount:
As a defense mechanism?

Justin Donnelly:
Exactly. The alters help the child say, this isn't happening to me, it's happening to someone else.