Asoha

Player, or the Anomaly in Deeptale is an entity that actually has a representation inside the universe. An appearance that even I can't tell if it's a ghost, a demon, or a demonic ghost. What I can say is that they are a being of pure determination.

They have control over the timeline, as well as being able to manipulate time, with resets and such, they also have full access to the "files", being able to use them to play around and make slight changes. (what is undone when reset)

They have a manipulative personality, and affect every decision Frisk would have to make during the journey, and can possess him when he doesn't want to follow their orders.

Their origin is unknown, as is much important information about them.

They also accompanied Chara in life, ever since fell underground.