angel

Today, my chief invigilator said I was her "angel" because I helped her in her time of need.
I remember how I met an "angel" too who gave me a lift to school when I first got my driving licence and was too scared to venture out on the highway. I drove to this angel's house each morning and park my car there. This went on for a few months until I gained confidence to drive all the way to school.
Have you met an "angel" before and have you been an "angel" to anyone?