Chapter 6 - Further Clarification
The Entity is a normal non-special regular single particular individual male human person who ""has not revealed his name yet" and "has a BCI implant in his skull"". All BCI have ai as part of the BCI. The thing that is special about his (the Entity's) BCI is that his BCI sends things like signals/etc to his brain. Signals that register in his brain as various brain-interpreted things, but mostly for verbal communication between the BCI's ai and the human that the BCI is in the skull of (the entity is that human that the BCI is in the skull of). The aforementioned ai is pretty much like today's robots but whithout a body. It directly converses with "The Entity" in his skull without using sound/audio. Think of it as like the Anime show Naruto, Naruto has a demon fox that was sealed via naruto's body being that demon fox's container. Naruto converses with the demon fox privately in his head/mind or something like that, but it's 100% private conversation between Naruto and the demon fox.
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Another special thing about the Entity's BCI is that it has wireless capability and can connect to wireless internet that the BCI's ai utilizes to acquire info and relay/convey that info to the Entity whenever the ai "chooses or something like that" and/or whenever the Entity asks the ai to tell him whatever particilar info that he wants to obtain from the internet's available info.
"The Entity having his own simulation-avatar" would be how the Entity would be partaking in the Simulation experience, no different than any other human.
In the world of "Gigged Up", "there isn't anything actually supernatural in the non-simulation universe(s)", so the closest thing to "actual real supernatural things being possible" is "simulated supernatural things". In the world of "Gigged Up", "there isn't any actual magic in the non-simulation universe(s)", so the closest thing to "actual real magic being possible" is "simulated magic". In the world of "Gigged Up", "there isn't actual real magic in the non-simulation universe(s) nor is there actual real supernaturalness in the non-simulation universe(s)".