Adalon is a silver dragon who attempted to keep peace between the drow and the surface elves by guarding the passageway between the surface and the Underdark, often being successful.

In the past, Adalon was married. She and her husband fought a powerful evil, but he perished in the attempt. After destroying it, she was granted a wish. At first she attempted to resurrect her husband, but that was not possible. So instead, she wished for his spirit to fertilize some eggs.

In Baldur's Gate II, Adalon will ask Gorion's Ward and their party to retrieve her eggs after they were stolen by Jon Irenicus. She will ask them to infiltrate the drow city of Ust Natha and steal back her eggs disguised as drow. By doing this, they will be able to return to the surface, so they may continue on their quest to defeat Bodhi and Irenicus.

If the player retrieves her eggs unharmed, Adalon will take them to the surface, kill a few drow, and leave. If the eggs are destroyed, Adalon will fight the player. Her blood may be used to make the Human Flesh +5 armor.