Guardian ad Litem
A guardian ad Litem is a guardian appointed by a court to protect the interests of a minor or incompetent in a particular matter. State law and local court rules govern the appointment of guardian ad litems. Typically, the court may appoint either a lawyer or a court appointed special advocate volunteer to serve as guardian ad litem in juvenile matters, family court matters, probate matters, and domestic relations matters (Source).
Guardian ad Litem is also known as CASA in some states. Below are links to CASA & GAL websites for states and counties in the SE.