Adrasteia is Saradomin's daughter, but is not a god despite her parentage. Her existence was first revealed during Sliske's Endgame if the player raced Saradomin and he reached the Stone of Jas first. She was kidnapped by Nex from a planet under the control of a group called the Obsidian Tribunal to use as a bargaining chip, in case Saradomin won the Stone of Jas and was placed under Nex's guard.
Depending on the player's actions, prior to the events of Sliske's Endgame, Seren's agents may have discovered her within the Ancient Prison and retrieved her from Zaros's control, believing him to be too dangerous, albeit with the same intent of using her as a tool to keep the Stone out of Saradomin's hands. If players speak with Saradomin about it afterwards, he says that Adrasteia has been returned to him and that she is now safe.
- Adrasteia is a nymph from Greek mythology who was charged with nurturing the infant Zeus.