[Orange Duke]

He's resistant against two-thirds of physical damage types.

But weak against the most common one. Furthermore, corrosion attacks occur most often in close range.

But speaking of metals and colors, here's what I found for Trilead Tetraoxide: http://www.webelements.com/compounds...etraoxide.html

"Colour: orange-red"

Trilead Tetraoxide is Azure Heir's, holder of the Infinity, nickname. Or it might be his actual avatar name since this was what was used on the avatar colour chart. Yet Azure Heir follows the proper formatting of avatar names.

The name occurs because Trilead Tetraoxide is a crucial ingredient for life-extending alchemic substances, and the same colour as the royal red/yellow for a prince's robes. It is strongly hinted at that Heir is in fact the crown prince of Japan, or at least one of the members of the royal family.