Ydhailys was killed by a devil possessing Crush on 7 Aravan 2157, but brought back to life by a pact that Onyx made with the devil.
- Based on Onyx's previous (albeit limited) experiences with faerie dragons, she has guessed that Ydhailys is in her "teen" years.
- Ydhailys has been shown to be altruistic to a fault, as she rushed off into The Witherwoods to save two "archeologists" who wandered in there. The Lady of the River has told the party that this is typical behavior.
- Ydhailys, for a time, was affected by the corruption of the Witherwoods, and grew increasingly weak during the party's travels through the Svelagr Mountain Range. She was successfully cured of it by Vyrmith.