guardian
//ˈɡɑːr.di.ən//
Noun
guardianSingular
guardiansPlural
1
A person who protects, defends, or watches over someone or something.
The dog acted as a guardian of the house while the family was away.
2
A person who has the legal authority and duty to care for another person, especially a child whose parents have died or are unable to care for them.
After her parents passed away, her uncle became her legal guardian.