Sentient being in a quick scope is a sort of being that lives in our universe but yet, in others. They may have great power and insight to our world and God in any religion would be a sentient being.
You must understand Meh, demons cannot walk our earth let alone possess a human body rethought will and the demon must be very powerful (I mean a king in hell) but they attach themselves to an object and then use that object to get fear and energy from you. But, that's a very low amount of demons. Demons are quite curious and not all bad. They are like us somewhat and have good and bad sides. Some demons are more good than evil and vice versa. But, even if the demon is good and is willing to help you, they all love to trick people. They are a cunning being.
