In the 'grand k visual novel', the main characters could be very diverse. It might have a female lead who is brave and intelligent, trying to solve the mystery related to the 'grand k'. There could also be male characters, some of whom might be allies and some might be rivals. There could be characters from different social classes or backgrounds, all brought together by the events and concepts surrounding the 'grand k'.
There's no way to know for sure who the main characters in the 'grand k visual novel' are without more details. However, it's common for visual novels to have a protagonist who drives the story forward. There might also be a supporting cast of friends, family members, or antagonists that interact with the main character in relation to the 'grand k' concept.
I'm not entirely sure specifically what 'grand k visual novel' is about as there could be many different stories or concepts within it. It might be a unique story with its own set of characters, settings, and plotlines that are specific to that particular visual novel.
I don't know for sure as I haven't experienced this visual novel. But usually, there would be a protagonist, perhaps a young man or woman who is either a member of the upper class or someone new to the ball scene. There might also be a love interest, and some antagonists like jealous rivals or those with ulterior motives.
There's Kuroh Yatogami. He has his own set of abilities and plays a significant role in the narrative. Another important character is Neko, who also has special powers and her presence adds a lot to the story. These characters interact with each other in various ways, driving the plot forward.
There's no way to know for sure who the main characters are in 'k00 company visual novel' without more knowledge about it. They might be ordinary individuals thrust into extraordinary situations, or they could be heroes or heroines with special powers or abilities. Maybe there are multiple main characters that interact and influence each other's stories.
I don't have enough information to determine the main characters. It could be politicians within the grand old party, party strategists, or perhaps people who are affected by the party's actions in the context of the story.
In the Fate Grand Order Visual Novel, the Master is of course a central character. Then there are various Servants. For instance, Mash Kyrielight, who is a Demi - Servant and an important ally to the Master. Servants like Archer EMIYA also have significant parts. He is a skilled fighter with a complex past. There are also characters like Romani Archaman, who provides support and information within Chaldea. All these characters interact and their relationships shape the story.
Azusa Hamaoka is a memorable character. She is an experienced diver and serves as an inspiration for some of the other characters. Her calm and collected nature contrasts with the more chaotic personalities in the club. And then there's Chisa Kotegawa, whose presence often stirs things up and her relationship with the other characters, whether it's friendly or a bit more tense, makes her a character that's hard to forget in the Grand Blue Visual Novel.
Since I'm not familiar with the 'Grand Hotel Novel', the main characters might be a famous actress staying at the hotel for a break from her hectic career, a bellboy who has big dreams but is stuck in a low - paying job, and the hotel manager who has to keep everything in order while dealing with various personalities. They would all play important roles in showing different aspects of life in the grand hotel.
Since I haven't read it, I can't say for sure. But I assume the grand princess herself is a main character. There might also be her parents, who are likely the king and queen.
I'm sorry I don't know exactly who the main characters are in the 'nightbringer 40k novel' as I haven't read it. But in Warhammer 40K novels, main characters can be Space Marines, Imperial Guardsmen, or various xenos characters.