I'm sure Ilias needs no introduction to most people who read this. But if you don't know who she is, I'd highly recommend looking up 'Monster Girl Quest'.
The creator of the world and all its life, Goddess Ilias is the supreme religious figure in the world. Though she holds enormous power, she’s rarely seen on the Earth itself. However, her will is handed down to the humans living on the Earth and she is revered as their goddess. Her arch enemy since time immoral is the Monster Lord, the current being Alipheese Fateburn XVI. With an extreme desire to destroy all monsters, she uses heroes to go on quests to destroy the current Monster Lord and defeat any monsters on their way. In return for their “unwavering service” she gives them her blessing at a coming of age ritual.
She regards humans who have lost their faith in her to be defective and failed creations and cares not for them, going so far as to consider rebuilding the world in her more idyllic image.
Ilias Commandments
Ilias has five commandments she expects all humans to follow. The punishment for not doing so is very severe. The commandments are:
1. “Thou shalt not have intercourse with monsters.”
2. “Be dutiful in your prayers.”
3. “Point your sword at the Goddess and thou shalt cry.” (over time, this has come to include statues, monuments, altars, and other representations of Ilias.)
4. ??? (This commandment remains unknown at this point in time.)
5. “The worst of the five prohibitions to break: Rebelling against Ilias.”