A guardian is an adult who is responsible for a child’s care, development and upbringing. For example:
giving the child a safe and secure home, and loving care and attention
helping the child develop as a person – their mental, emotional, physical, social, cultural and other development.
When a child is very young, a guardian will make decisions for them about things like:
where they live
where they go to school
medical treatment (other than routine medical matters)
what their culture, language and religion will be
any changes to their name.
As the child gets older, the guardian and the child will make decisions together more and more until the child is able to make some decisions on their own.
A guardian appointed by a parent in their will (a testamentary guardian) doesn’t have the right to have the child in their care. If they want this they can apply to the Family Court for a Parenting Order. (‘Parenting Order’ is a legal term. It doesn’t mean only parents can apply.)