conservator
US /kənˈsɜ˞ː.və.t̬ɚ/
UK /kənˈsɜ˞ː.və.t̬ɚ/

1.
2.
a person appointed by a court to manage the affairs of another person who is legally incapable of managing their own affairs
:
•
The court appointed a conservator for the elderly woman who could no longer manage her finances.
•
The conservator is responsible for making decisions about the patient's medical care.