First Referenced:
The Portal in the Forest (Part 4)
Additional References:
'I was told that everyone I'd served with in the military died shortly after I left. (Part 7)'
The Regret Demon is a mostly unknown entity that presents trade options that invariably lead to remorse and regret. The Regret Demon was first encountered by Cristina Thompson after it hijacked the primary forest portal to discuss a truce.
As a form of communication interface, the Regret Demon used a human woman, described as middle-aged and wearing wire-rimmed glasses, as a puppet. It is unconfirmed whether the puppet woman was fully human, however she appeared to resist being recaptured by the neural tissue, and through subtle abnormalities in responses to queries communicated valuable information to Cristina Thompson without the Regret Demon extracting payment in response.
During the final evacuation of The First World, the Regret Demon again hijacked the primary portal of Thomas while the evacuation was underway. The puppet woman showed extreme anger, and after the attempt to pass through the portal failed, a tentacle wielding a laser attempted to kill Cristina Thompson. It's attempt was prevented by Conn Thompson prior to their escape to a Farming World.
Traits:
Apparently a large organism, capable of redirecting interdimensional portals and generating tangible illusions or matter. Comprised of neural tissue in a similar fashion to the Dreamer On High entity, the Regret Demon has at least one (and likely more) enslaved humans under direct mental control.
Displays hostility and fear towards the Soul Reader (Book), likely due to its ability to read information forcibly from souls without the need of providing payment.
Extremely hostile towards Cristina Thompson for her role in using the Soul Reader (Book) and Thomas' Portal generation abilities to save the vast majority of The First World inhabitants, prior to its destruction.