The Arella have been on earth officially since 11/09/2023, but questions and theories have been raised as to whether or not they have been here before. Could they be the source of the christian angels? Could their craft be the inspiration for many of our world's wonders?
This section of the Pocket Guide to Headquarters Island will cover these beings.

So you want to make an Arella?
We can only council you to first read the entire Arella section of this guide, and then recommend you speak to Anathema, and then Asha for approval.