GUARDIAN

[noun] [C] - a person who has the legal right and responsibility of taking care of someone who cannot take care of themselves, such as a child whose parents have diedThe girl's parents or guardians must give their consent before she has the operation.(formal) A guardian is also someone who protects something.These three official bodies are the guardians of the nation's countryside.a self-appointed guardian of public moralsA guardian angel is a spirit who is believed to protect and help a particular person.(figurative) The Tourist Protection Unit is a squad of 45 undercover officers who are assigned as guardian angels to protect the city's unwary visitors.