Could you please have some variety on their body I am not saying that you should try making some of them a twink or anything, I just wish there is some variety in the body builds while also being able to be classified as a bara. Because from their similar poses it is quite hard to differentiate them. Like making Otto smaller or even giving them unique neutral poses that matches their personality.
As great as that might be everything your asking costs money and to change anyone of the main cast would means remaking the sprites.
Also you can't differentiate them... Its not like they're different species with widely different characteristics. I do wonder how you see them then if you find it difficult to tell them apart.
It's a Bara themed VN so most if not all the characters we interact with especially the main cast will be muscular.