Shai Oblivion Armor Set
All the other clasess that have this outfit have some form of design on the pants, and only shai has a design close to having nothing. I don't have to say much, the images can speak for themselves. Any other Shai outfit allow players to choose any alternative underwear, which works for anyone who doesn't want their Shai wearing her "Birthday Outfit". At least an option so we don't have to forcefully need to be on that state with no other option than stop wearing a premium outfit.
Suggestion: Just give the poor girl something to wear, and cover up, even if its a toggle option.