The Circle is the emitter, and the lines behind it are the particles. As you can see, the particles are spawning and moving in the opposite direction of where the circle is moving, but is still facing it.
I’m assuming it’s tracking the players angle or where it’s pointing, so just add or subtract 180 degrees to the angle and it’ll be behind the player.
Well is emit set to angle as dependent? If not and the particles is set to the objects rotation, then in the other emit you set the angle +180 of what you have set in the first emit behavior inside the behavior.