Maybe the box is there because it’s already been previewed (it stays on the character until it passes a line that tells it to clear).
Since you’re using a prop and not an overlay, you don’t need to do the walk_box_neutral_loop animation because it’s gonna be attached to her anyways.
When she enters, do;
@RUE enters from left to screen center and RUE is walk_box_neutral_loop
So it happens at the same time.