Guardian
Part of speech: noun
Definition: Someone who guards, watches over, or protects. A person legally responsible for a minor (in loco parentis). A person legally responsible for an incompetent person. A superior in a Franciscan monastery. A major or final enemy; boss.
Example sentence: I think we all do have a guardian angel. I believe they work through us all the time, when we are thoughtful and good and kind to each other.
Tutelar
Part of speech: adjective
Definition: Serving as a guardian; protective; tutelary.
Part of speech: noun
Definition: One that is tutelary.