Duality Dimension

The Duality Dimension (デュアリティ次元 Dyuariti Jigen) is the Dimension where all Duelists use Duality Monsters. Unlike the rest of the Dimensions, inhabitants of the Duality Dimension do not have one color in their bodies; they have two body colors, one in the right-hand part of the body and one in the left-hand part of it. The left-hand part of the body has the color of the Attribute of the Merger they use most often for Duality Summons, while the right-hand part of it has the color of the opposite Attribute of that of the Merger, as seen in this chart:

As stated in the Duality Monsters page, since TIME and MONEY Duality Monsters don't exist, grey and silver body colors don't exist.

People whose body color patterns are the same have a tendency of becoming friends very easily. For example, a habitant of the Duality Dimension whose body color is Yellow and Purple (yellow in right-hand part and Purple in the left) has a tendency of becoming friends with one whose body color is right-hand Purple and left-hand Yellow.

As stated by Yupo, 's counterpart in this Dimension, Duality Dimension inhabitants are people who possess strange powers and fight with their instincts if they battle with someone whose Duality Monster has an "opposite" Attribute than theirs.