Autophobia: Strong, morbid fear of being alone, isolated and lacking support.

The concept of this entity is based of the "Tosher," a Victorian sewer hunter. A group of two to four people searched the sewers for valuables to sell. 
Equipped with hoes, lamps, and sacks or bundles for any loot found. 

The profession was dangerous due to the presence of impurities and gases in the sewers, as well as the risk of getting lost.

Concept for a mid-boss in my psychological horror game "My Name Is..." :

https://store.steampowered.com/app/3698670/My_Name_Is/