In Luo Mountain, those responsible for handling the power of the strange and known as demon hunters are called "Impermanence".
And dealing with these strange things does not necessarily depend on fighting and killing. Zhu Shi once told me that sometimes, weird events are caused by demons or humans who wield the power of the strange, and those situations indeed need to be resolved with violence; however, some weird events have no tangible enemy and appear before people in the form of phenomena. "The Basement on the Fifteenth Floor", which I encountered in the past, is more akin to this type.
Soul loss, too, is a weird event that manifests as a phenomenon. While it's too early to say whether this phenomenon has a hidden hand behind it, the current stage of research is focused more on the phenomenon itself.