Most trailing type of effects use animtrails.
For glowing eyes you would just add a parameter in the characters material to increase emissive. If the eyes don’t have their own material then you’d just mask out that section of the uv.
The “Intro to Cascade” tutorials are good.
You could look into tornado effects tutorials and basically make a lightning tornado around your character by using more jagged textures.
Getting stuff to swirl around limbs may be tricky. it would involve some trial and error to figure out something that looks good.