Since I don't have direct experience with it, it's difficult to say for sure. However, some visual novels have unique art styles that set them apart. Maybe 'aku no onna kanbu visual novel' has a distinct art style that enhances the mood of the 'aku no' (dark) theme and the portrayal of the female characters ('onna kanbu').
I'm not sure specifically as I haven't played it in detail. But generally, a visual novel often involves a story with characters, plot development, and probably some kind of relationship exploration. 'Aku no onna' might be centered around a female character who could be associated with some sort of 'aku' which might mean 'evil' or 'dark' in Japanese, so perhaps it's about her story in a dark or complex situation.
Not having played this visual novel, it's difficult to name the exact main characters. But if we assume it follows common visual novel tropes, there could be a group of characters around the 'aku no onna'. There might be a childhood friend who has a different view of her compared to others, and perhaps a mysterious figure who holds some secrets related to her origin or true nature. These characters would interact with her and drive the plot forward.
Overall, the Aku no Hana anime and manga have their own unique qualities. The anime might have changed the tone or presentation in certain parts, but it still has its own appeal. It depends on personal preferences.
Well, it's hard to say. 'Aku no Hana manga' is a specific manga title, and 'rock' could be related in terms of theme, inspiration, or it could be completely unrelated. It really depends on the context it's being used in.
Overall, Aku no Hana has its own charm and differences from similar mangas. Its art, story, and character development set it apart. There might be some common elements, but the way they are presented makes it special.