guardian

noun6

1. •
   a person who the law makes responsible for a child in place of the parents
2. •
   Someone who guards, watches over, or protects.

   • Those who ought to be the guardians of propriety are often the perverters of it. Hence Accidence for Accidents, Prepostor for Prepositor and Constur for Construe[…] — 1791
3. •
   A person legally responsible for an incompetent person.
4. •
   (US) A servicemember of the United States Space Force.
5. •
   A major or final enemy; boss.

   • Secret weak points of bosses/guardians. — 1993
6. •
   A superior in a Franciscan monastery.