The harem might include a mysterious witch who is initially an enemy but then falls for the knight's charm. Also, a female warrior who has her own reasons for following the knight. She could be seeking revenge against a common foe, and the knight's harem provides her with the resources and support she needs. And of course, there could be a young maiden who is simply in love with the knight's noble deeds.
The main characters could be the women in his harem. There could be a strong - willed princess who joins his harem after he saves her from a political intrigue. Another could be a peasant girl with a kind heart and great cooking skills.
Well, perhaps the sexy knight starts with just one or two companions in his 'harem'. As he travels across the land, his charm and heroic deeds attract more. His harem could be a diverse group, each with their own skills. Some might be great archers, others skilled in magic. And the story could revolve around how he manages all these relationships while still being a noble knight.
There could be a human girl who is not part of the main story but has some sort of special ability that Hanabusa is drawn to. Maybe she can see the future or has a unique form of psychic power. Their relationship would be complex as he is a vampire and she is a human, and they would have to deal with the differences in their natures.
The knight would obviously be one of the main characters. He could be a new character created specifically for the fanfic, or perhaps a reimagined version of an existing RWBY character with knight - like qualities. The maidens would also be main characters. They could be based on the RWBY girls, or entirely new characters with unique abilities and personalities.
The main characters are the king and his knight. The king could be a complex character, with his own backstory, motives, and insecurities. The knight, on the other hand, may have a reputation to uphold, a code of honor to follow. There might be other characters like the queen, who could add more drama to the story, or a jester who provides some comic relief, but the king and his knight are bound to be at the heart of the narrative.
The knight himself would obviously be a main character. He could be an experienced warrior with a mysterious past. There could also be a wizard who has some connection to the knight's 100 - year journey, either as a helper or as someone who initially set the knight on this path.
In the Dark Knight story, the most prominent characters are Batman, who is the Dark Knight trying to protect Gotham. Then there's the Joker, a chaotic and evil villain who loves to create mayhem. Also, Harvey Dent is an important character. He starts as a district attorney with good intentions, but later gets corrupted by the Joker's actions.
Probably the little knight himself is a main character. There might also be a mentor figure, like an old knight or a wizard.
The main character is of course the black knight. There may also be other knights he interacts with, like his rivals or allies.
In the Dark Knight story, there are several main characters. Batman is the protagonist, a vigilante protecting Gotham. The Joker is a very important character too. He's a maniacal villain with a twisted sense of humor. Then there's Harvey Dent. He starts out as a good guy, a district attorney trying to clean up Gotham, but later becomes Two - Face. These three characters play crucial roles in the story.
The knight is surely one of the main characters. In addition, there might be his squire, a young boy who helps him with his armor and horses. There could be a wise old wizard who gives the knight advice. And perhaps a beautiful princess who is the object of the knight's affections or the one he is sworn to protect.