In Blender 4.1, I’m trying to make an animation based off of JJBA, and wanted to try making the “aura” that the characters have when using their abilities, how could I do this in the Eevee engine? I tried looking up tutorials, but they didn’t seem to work.
Try using Layer Weight Node.
From Blender 4.2 (EEVEE_Next), you should use the Glare node in Compositing to give a diffused light effect.