Over 300 years ago, Don traveled to the Dark Continent and wrote a traveler's journal consisting of two volumes: "East" and "West". While the "East" edition is in the hands of V6, the "West" edition was never found. According to Ging, there are three possibilities: it has yet to be found, it was never written, or Don is still working on writing it, which would suggest that he is still alive.
Don Freecss shares his surname with Ging and Gon Freecss but it is currently unconfirmed if they are related.
Curiously, the image that appears when Ging introduces Don seems to contain a realistic picture-like image of a person with Asian characteristics smiling. However, this could be due to the phenomenon of seeing patterns in randomness—pareidolia.