I think you are asking what a guardian "ad litem" is. A guardian is a person who acts to protect or help someone. "Ad litem” means “for the lawsuit". There are different kinds of guardians ad litem for different kinds of cases. In some cases, the judge names a “guardian ad litem” to work with a child or a person who has a disability that makes it hard for them to understand a case that involves them. In other cases, like in custody cases or neglect orabuse cases, a guardian ad litem may be appointed to investigate and stand for the child’s best interests.