Legal Guardianship in Wisconsin. A guardian is a person or organization appointed by a court to exercise care, custody and control on behalf of a ward — a minor or an incapacitated adult. Wisconsin recognizes two types of guardianship: guardianship of the person and guardianship of the estate. Wisconsin Statute Chapter 54 should be referenced for a detailed explanation of the legal guidelines published for Guardianship and Conservatorships. For additional information please see the Wisconsin Adult Guardianship Handbook.