Concept of possession that I have been developing. The Kelion that everyone knows (and loves) is when the demon possesses the goat by 50% . BTW I baptized the goat as Monti :)

1%: The demon clings to Monti and basically uses him as a means of transportation. Monti has full control of the system, while the demon just hangs from him.

25%: Monti's body begins to mutate. His thoughts become more chaotic because of the demon within him.

50% Its most stable form, both Monti and the demon control the system at the same time. Both parts are in harmony and in a state of comfort. It is in this state that the true personality of the binary being known as Kelion can manifest.

75% The demon begins to consume the body of its host. Monti's mind has already begun to lose its sanity (if he ever had any of it).

99%: The demon has acquired almost all of its power thanks to the consumption of the body of its host, of which a sad remnant remains. This form is extremely unstable as the daemon needs the other part of the system to be awake. 100% possession is not viable since it would cause the death of the host and the destruction of the demon by losing its source of energy.