deescalator
A deescalator is a device or technique used to reduce the intensity of a conflict or tense situation. The term can refer to physical objects or behavioral strategies. In the context of physical objects, a deescalator might be a device designed to slow down or stop a moving object, such as a vehicle or a mechanical system, to prevent a dangerous situation from worsening. This can involve mechanisms that gradually reduce momentum.
More commonly, "deescalator" refers to an individual or a set of actions aimed at calming a person