reviver
Reviver is a noun derived from revive. It denotes a person or thing that brings something back to life, consciousness, or operating condition after a period of inactivity or failure. The term is broad and informal; in professional contexts, more precise terms such as rescuer, resuscitator, restorer, or reboot mechanism are often used.
In medicine and emergency response, a reviver can be a person who helps revive someone who is
In technology and engineering, reviver describes a mechanism or process that restarts or recovers a system