a rescuee or maybe a hero
Gratitude, relief, and appreciation are some common feelings when someone rescues you from a challenging or dangerous situation. These emotions can create a strong bond between you and the person who helped you.
hero
A danger on the road.
sentinel
if someone is in physical danger call the police on your local emergency number
The person is a blackmailer.
Answer It can be a loved one. Sometimes if someone has been threatened they will be watched over, someone who is ill, children, someone in danger.
A person?
a person
You call that person a scholar.
Call for medical help and do not move the patient unless they are in immediate danger.
You would call them someone who peruses.