There’s quite a number of ways to make an arrow, start by using a debug arrow, like so:
Once you have it going, figure out how you want it to look.
- a 2d / 3d widget
- a stretched mesh
- a spline mesh component
- particles (ribbon, most likely)
- something else?
All of these could work, depending on what’s needed. If you’re not sure what method to choose, perhaps you could provide a visual reference instead. For example, at a glance this looks like a 2d widget:
