Not having read the 'akugyaku no black maria web novel', we can only speculate. Black Maria is probably a central character. There may be other characters that interact with her, like perhaps a mentor figure who guides her, or an antagonist who opposes her. It's also possible there are side characters that help to flesh out the world of the story, but again, this is all speculation without actually reading the novel.
Since I'm not aware of the content of this web novel, it's difficult to determine the main characters precisely. However, if we assume from the title, Black Maria is a key figure. There could also be other characters who are friends, foes, or companions to Black Maria, but without reading the novel, we can only guess.
As I haven't read the 'akugyaku no black maria web novel', I can't say for sure who the main characters are. But given the title, Black Maria is likely to be one of the main characters.
I'm not sure specifically as I haven't read it. But generally, a web novel often contains a unique story with its own set of characters, plotlines, and themes. It might be about a character named Black Maria involved in some sort of adventure, conflict, or relationship within a fictional world.
I'm not really sure as I haven't read it specifically. It could be a story about a character named Black Maria in a context related to 'akugyaku', which might be some kind of unique setting, genre or theme in the novel.
I'm not sure specifically as I haven't read it in detail. But generally, a light novel often contains elements like unique characters, a fictional world, and a story with some kind of adventure or character development. It might be about the character Black Maria in a world filled with mystery and challenges.
I'm not sure where you can find this novel. You could try checking in local bookstores that have a wide selection of novels, especially those that carry niche or international titles.
Another option is to check with local libraries. Although they may not always have a large selection of light novels, it's still possible that they could have 'akugyaku no black maria light novel'. You can also look into niche anime and manga stores, as they sometimes also stock related light novels.
I don't have enough information to determine the main characters. It could be a single character with a black - bellied personality at the center, or there could be a group of characters where one is black - bellied and the others interact with them in different ways.
The main character is the black summoner himself. There are also likely other important characters like his summoned creatures which might have unique personalities. And there could be characters he meets during his adventures, such as fellow adventurers or enemies.
In RWBY Maria fanfics, Maria herself is central. Ruby Rose is frequently present as she is intrigued by Maria's past and abilities. Ozpin can also be a main character in some fanfics as he has a long history and might have interacted with Maria in the past. Qrow Branwen could also be a main character as his story is intertwined with the overall RWBY plot and he could have some sort of relationship with Maria.
The main character in the Black Widow web series story is Natasha Romanoff, of course. She is the Black Widow. Yelena Belova is another significant character. She and Natasha have a complex relationship, perhaps as sisters in the context of the Red Room. There might also be characters from Natasha's past in the Red Room, like her trainers or other Black Widows, who could play important roles in the story.
The main characters include Asta, who is unique as he lacks magic but makes up for it with his tenacity and determination. Yuno, on the other hand, is highly gifted in magic. Then there's Sister Lily, who is important in Asta's life as she was someone he looked up to in the orphanage. These characters play crucial roles in driving the plot of the black clover web novel forward.