So I have seen a few people have more than 1 aura on their character and was wondering how this is done?
Short answer: "Hax!"
Long answer: They probably did some database editing of their character file/s to give themselves the extra auras. I'd tell you how, but frankly it's quite technical, and I'm posting from my phone at work so it's kinda hard to get into...
Some weapons/outfit bits may have thier own aura. also there were a few of the unlocked emotes that left an aura on you after it was over..
I'm reviving a very old topic.
Yes, you can have more than one aura. I have problems after eight - they seem to bleed through during costume changes.
You can slot auras in any slot number - but they bleed into other costumes if you slot them in 24, 25, or 26.