Hi,
I want to achieve the same ghost effect for a humanoid model. Are there assets which have such skin effect or shader? I’ve looked at GitHub - keijiro/Skinner: Special Effects with Skinned Mesh in Unity but it doesn’t work properly in 2017.3 and also doesn’t provide such effect out of the box.
I think that your example could be reproduced by simply using a standard material set to cutout or fade, with a noisy alpha map and a strong emissive color.
Wow!
From looking at it, it reminds me of that cool, old school FX trick
that I learnt in blender, where you make all of the vertices, of an object glow.
And if done correctly, it would make the object, look really magical and
give that supernatural effect. Even better, if you did it to a human, or fairy
type character.
I did that cool magic trick alot, years ago, when I was a blender noobie. 
Those days were so much fun.
From that gif it just looks like a transparent blobby noise texture applied to a simple model, with a full screen bloom post process. No particles or other advanced effects.