Mannequin

The information provided may not be entirely accurate and requires more testing. Mannequins are a somewhat rare enemy that only spawn in and around malls. They remain dormant, even when walking past them, and only move when out of players line of sight. Destroying them in any way causes significant sanity damage.

They will usually spawn in groups of 4-6, which can be devastating for player trying to keep their sanity. On the other hand, player who is already insane can destroy them with no penalty whatsoever.

Behavior
Once approached, mannequins will start to follow the player whenever they are out of sight. They seem to have complete knowledge of players location, able to follow around many corners and rooms.They will open doors and often get stuck in the doorway, unable to move any further due to being in line of sight.

Strategy
Mannequins can be killed with any melee/thrown weapon, however this causes the Horrified status effect, and since they spawn in groups, it can quickly cause players sanity to drop to 0.

Often times, they will block doorways, with seemingly no escape. It is possible to pull furniture and hide behind it, breaking line of sight and causing them to come closer, freeing the exit in the process.

Furniture can also be used to block them inside a room, however they will start breaking it down immediately. It takes them roughly 20 - 30 turns, and when they're done, they will continue following the player.

There is currently no known way to dispatch of Mannequins without any negative effects.