Sage seems to like giving his character’s prominent ab’s while shirtless, even when it’s highly unlikely that they’d have them. Female Humans typically find it between challenging to outright impossible to have ab’s while maintaining a healthy diet (aka, not being malnourished), and even Male Humans typically have to specifically diet and train their abs specifically for appearance in order to have them be prominent.

But, hey, it’s a comic and a design choice. I’m not going to complain about that.