How does a psychic vampire work and how do they actually take your energy?

They do it many ways.

Some just sit almost in front of you and glare. Some of them just keep on churning, constantly going over and over the same things to make you agitated and incite you to spend your life force.

Sometimes you can see it with little children, that all they want to do is get all of the attention you have to give, to capture as much of your energy as they can, even if they can’t use it. You’ll commonly see this in just all sorts of people.

It’s an extremely common trait among passive aggressive people. One of the things about a Psychic Vampire is that in order for them to do what they do, you have to make a link with them. That means you have to be willing to engage them.