YCH Commission for Rakakuza! Thank you!
The commissioner asked for the concept in order to show off a Nevrean male design which can be physically recognized as a Judda. We talked about certain ideas or what would and wouldn't be considered Judda, this is the result of unique colors whilst still maintaining a proper appearance.
Though, strictly speaking of the word "Judda" in canon context / story, for the moment, the only thing that applies is the position of Quu in the late stages of Gold Ring.
You can read the existing information about Judda so far in the article in the Vilous Wiki, however, as for the treatment of Judda in the ongoing Vilous Manga, it is not feasible to write out a fully detailed concept as the story is still being written. These things cannot be decided as of yet due to the need for careful considerations towards Canon and Timelines/effects. Therefore, the canon on this element, in particular, might change greatly in the future.