You can achieve auras effects in the editor like so :
Add a mesh sampler, then in your SpawnerScript
Position = YourMeshName.samplePosition();
This will make your particles start on a random point of your mesh, this is the first simple step to create every auras effects.
However, it will not work in unity before the next version of the plugin.
In the video you linked, the character mesh is divided into multiple parts and there is one effect for each part that is link to the corresponding bone in Unity, this is some kind of hack but it works.
I don't have this particular package to share, so if you tell us more precisely what you are trying to achieve maybe we can elaborate a little more on your issue.
Hope it helps!