backupguard
nounUK /ˈbækʌpɡɑːd/
US /ˈbækʌpɡɑːrd/
A backup guard is a helper who keeps someone or something safe if the first guard needs help.
The backupguard stood by the door while the main guard took a break.
OTHER MEANINGS
2. A second copy of important data kept safe in case the first copy is lost.
The backupguard saved all the photos when the computer crashed.
3. A player who comes in to protect the team when a regular defender is tired or hurt.
The coach sent in the backupguard during the last minutes of the game.
4. A person who watches over a friend to make sure they stay out of trouble.
Mia was the backupguard for her little brother at the park.