Bulge size options for character creation.

[NessaWyvern]

It happens very rarely, but in some cases, buttocks are very low on the priority list and won't receive any fat until the person will be outright obese.

Considering most of a woman's body fat is stored around the butt, hip and thighs, this is very unlikely (Our characters have pretty wide hips, meaning there should be some fat there, but when you move to the butt, there's nothing!). The second 2 pictures you provided actually have much narrower hips than our characters, and have a tiny bit more of a butt than some of the races in this game, including my Au Ra here.

The first picture? looks like they have very little muscle tone, or they used to be a heavier weight, and has a little bit of loose skin from weight loss. It's hard to tell without context, but it's pretty far from the norm.

And many of us FFXIV players want characters that fit more closely to the norm, and there's nothing wrong with that.