From DariaWiki

DeeDee Miller is the wife of Lee Miller, the owner of the Princess Fairy, introduced in the episode, "Just Add Water". She is mostly bored with her marriage and hits upon passengers such as Jake (who is quite freaked out) and Mr. O'Neill. The latter turns out to be a mistake, as Ms. Barch quickly pushes her overboard in revenge.

Her surname was given in "It Takes Two to Tangle", where Dr. Millepieds rules: "This marriage is a vivid illustration of what too much time on a boat will do to your inner ear."

DeeDee is voiced by Renee Rudick.