ad for Mega Goddess showing 7 pale skinned women in various bustiers and other fantasy clothes showing their breasts, they are holding weapons, on the far left is a blue haired girl in a white hood and white bikini top and a thong belt holding a knife and jumping away in a boobs and butt pose
close up of Mega Goddess ad showingthe blue haired girl in a white hood and white bikini top and a thong belt holding a knife and jumping away in a boobs and butt pose

More of a boobs and belts pose

Besides that the blue-haired girl's breasts are on the side of her body to make the boobs and butt pose, I think this is a world where the more belts you have the more status you have.  And the blue-haired girl is clearly by far the most important person on the planet.

(Ad for Mega Goddess: Eternal War, Waleneqi)