Legit all three of them have the same facial features and just have one emotion straight face...all the time
Difficult to point out facial features issues when it comes to manga... very often the majority of mangaka that draws mostly short serie (5 chapters Max or 2 vol max) know how to draw only one kind of face and differentiate characters by hair style and type of eyes. Understandable since the majority of comic mangaka are self taught and didn't went to art school or worked more on body anathomy ... My point it could be worst. And they can improve... Some professional CG illustrator aren't flexible with body dynamic either. It's common it become a joke example the artist of type moon using the same material while changing bits and details (hand arms, eyes...). Not dishing the guy ofc but it's pretty clear he's just trolling given that many of his works share the same base for body or face.... The saber face meme.
This is just dragging now