Noi is the one on the left with her jacket open and no shirt underneath. Notice anything that sets her apart from Abby?
Yeah, she has rather prominent tits, not a slab-like pair of man pecks.
I guess she packs them down pretty good when her jacket is closed, because they tend to kind of disappear. But since both characters expose themselves to one degree or another, we clearly see the difference. Noi also has a sort of Samus Aran thing going where she wears a mask and gets mistaken for a guy a lot when she's covered up, so there's a reason for her design.
She also exists in this weird high tech dystopian ultraviolent setting with magic, and is a sorcerer, not a wasteland with about the same tech level as now and scarce resources. So the idea that she might be artificially roided up on any number of things, technological or magical, is a lot more believable.