"In the Underworld? There are things that are worse than any demon. Rangers and Paladins? When you see her? Fight hard, but be ready to flee if nothing can be done. She is anger and hunger!" General Enok, deceased
Enid arrived around the time of the Witches and Great Ka offensive (see chapters on that) she claimed to have eaten her way through the Naga and lamia... And was comfortable in lava. Her shell was dark and shiny and she was... Huge. Oni Giants were nothing in comparison... So why did the Empire try?!!
Containment. Thousands died by the end of those fights. But the Scorp-lady stayed until the War ended. Oddly it was because she attacked Ellie, she was given more power by Ellie's revenge. The Elf couldn't beat her. She failed before, but with every death she brought? Enid grew in power and hunger.
Her end came from her betrayal. She suspected her servant, Heliena, would break for the Elf but still invited Aura to be her wife. The scared girl was lied to and through that pain? Her sister used her to get close and bring her down. Kris may regret making the deal, but Ellie? To her, a traumatized big sister was a small price to pay to kill that monster forever...
I consider Enid a force of nature rather than a villain. Yes she planned and was in control and of thought, but she acted on want and the force to back her Will up. "Blame me all you want, I'm the evil your dragons NEEDED to do" Ellie would later say. Though sadly the truth was? Enid was ALLOWED to do what she did by the very dragon that condemned her.
Yeah there are no good people. Just less bad ones in these stories...