Which entity? A new one? Or an entity from Flee or Algiophobia?
The character in Flee is Subject: 002 (Which is a ball of gelatinous meat, basically) and the entity in Algiophobia is yet to be classified. It might be a multi dimension entity that can only be visible in your mental state and not physical. Which it can’t be contained and it feeds off of the pain one experiences during trauma. Which is why the game is called Algiophobia, fear of pain.