Not to be confused with Captain Donnie.
Donie can be found wandering all over Lumbridge, and will give help to new players when asked, such as where to find or start quests and where to train Cooking and combat.
If you ask about a quest you have already completed, she will acknowledge that and offer a couple witty remarks or thank the player. Or even start yelling "Yarr!" back and forth with the player when asking about the Pirate's Treasure quest.