From the title 'ore no isekai shimai ga jichou shinai novel', we can assume that the sister is a main character. In an isekai story, there are often other types of characters. There might be a love interest for the sister, perhaps a noble - hearted knight or a mysterious mage. There could also be authority figures in the isekai world, like a king or a powerful wizard, who play important roles in the story either by helping or hindering the sister due to her unique non - self - centered trait.
I'm not sure specifically as I haven't read this novel in detail. But generally, the title might imply something about a sister in an isekai (another world) situation not being self - centered. It could be about her adventures, relationships, or how she stands out in that different world.
I don't know the exact main characters in this 'isekai de shippai shinai 100 no houhou novel'. However, in isekai novels, it's common to have a central character who is either an ordinary person from our world or has some special trait that becomes important in the other world. There might also be side characters like mentors, friends, or rivals that help or hinder the main character's journey in using the 100 methods to avoid failure.
I'm not sure specifically as I haven't read it. It could be about a unique hero who has some special traits or is on an extraordinary adventure.
Without having read the 'tsuki ga michibiku isekai novel', we can only guess at the main characters. It could be a hero - type character who is drawn to the isekai world by the moon's call. There might be a mentor - like figure in the new world who helps the protagonist understand the rules and powers related to the moon. And perhaps there are antagonists who oppose the protagonist's goals which may be related to the moon - influenced aspects of the isekai world.
As we only have the title'mondaiji tachi ga isekai novel', it's difficult to determine the main characters precisely. 'Mondaiji tachi' seems to be a likely candidate, but in isekai novels, sometimes the main character is someone who stands out among a group. There could be a leader - like figure within'mondaiji tachi' or perhaps a character with a special ability that drives the story forward. And of course, there could be other characters introduced later in the story that become just as important.
I'm not familiar with the specific details of this novel, but typically in such a story, the yandere kanojo would be a main character. There could be a male lead that she becomes obsessed with in the isekai world. And then there might be side characters like the local inhabitants of the isekai world, perhaps a wizard who helps or hinders her, or a group of warriors that she has to interact with depending on the plot of the novel.
Based on the title, it seems that the main characters are 'ore' (which means 'I' or'me' in Japanese) and Kawazu san.
Since it's about a noble's isekai adventure, the main character is most likely the noble who has been reincarnated. Alongside this character, there could be mentors who teach the noble about the new world's ways, friends who join them on their adventures, and antagonists who oppose their goals. For example, there might be a powerful wizard who doesn't want the noble to disrupt the balance of power in the new world, or a group of bandits who target the noble for their wealth or resources.
I'm sorry I don't know the main characters as I haven't read the light novel. You could try looking for summaries or reviews online to find out.
First, check out local bookshops that focus on Japanese literature or anime - related items. They may stock 'jichou shinai motoyuusha light novel'. Additionally, there are many online platforms dedicated to selling light novels. Websites like Bookwalker or Barnes & Noble's online store could be good places to search. You can also check second - hand bookstores, as they sometimes have rare or hard - to - find light novels.