Maria is the key character in RWBY Maria fanfics. Alongside her, characters like Pyrrha Nikos might be included in some fanfics, especially if the story is set in a time when Pyrrha was still alive and could have met Maria. Ren and Nora are also possible main characters as they are part of the RWBY cast and could be involved in the storylines related to Maria, either through battles or just character interactions.
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.
Obviously, Neon is one of the main characters. She's known for her energetic and unique personality. Often, her friends from Team FNKI like Flynt Coal can also be main characters. They usually support Neon in her adventures or join her in battles against the Grimm or other villains.
Some RWBY Navy fanfics also introduce original characters. These new characters can be the captains or crew members of the naval vessels. They interact with the RWBY characters, creating new relationships and storylines. Their presence can bring fresh perspectives to the fanfics.
One great RWBY Maria fanfic is 'Maria's Legacy'. It delves into Maria's past and how she influenced the current characters in RWBY. Another good one could be 'Maria and the Lost Art', which focuses on Maria's unique skills and how she might pass them on. There's also 'Maria's Encounters' that shows her interactions with different characters in the RWBY universe in really interesting ways.
Obviously, Sonic and Maria are the main characters. Sonic is known for his super speed and heroic nature, while Maria is often portrayed as a kind - hearted and intelligent girl.
Obviously, Baby Shadow and Maria are the main characters.
Obviously, Maria is one of the main characters as the title suggests. Her character would be central to the story, bringing her own backstory and motives into play.
Since it's Maria's story, Maria is likely the main character. But there could also be her friends, teachers, or family members who play important roles.
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.
A RWBY Maria Calavera fanfic can be really exciting. It could explore her backstory, like how she became the Grimm Reaper. Maybe it would show her early days of fighting Grimm and the challenges she faced.
I'm not sure specifically as I haven't read it, but I assume Maria from 'zero no maria' is likely a main character.