Since the details about this light novel are not widely known to me, we can only make assumptions. It could be that the main character is a high - school student who is quite ordinary in the real world but discovers extraordinary powers or abilities in the isekai world after school. There might also be a mentor - like figure in the isekai who guides the main character through the quests, and some interesting villains or rivals that the main character has to face during these after - school adventures.
I'm not sure specifically as I haven't read it in detail. But generally, 'isekai' often involves a character being transported to another world. Maybe this light novel is about an after - school quest in an isekai setting.
The main character is Touya Mochizuki. He is the one who gets transported to the other world along with his smartphone.
The popularity of 'isekai wa smartphone to tomo ni light novel' can be quite variable. Some light novels gain popularity through word - of - mouth, others through strong marketing. If this particular one has unique characters, an engaging plot that makes good use of the smartphone in the isekai setting, and has been translated into multiple languages, it may have a wider readership. But if it fails to stand out among the many isekai - themed light novels, it might not be as popular. Additionally, the popularity might also be influenced by how well it has been adapted, if at all, into other media such as anime or manga.
Based on the title, one of the main characters is likely the 'yankee'. And the other important character would be the'seirei' (the spirit) who loves the Yankee in the isekai world. But there could be other supporting characters that we don't know about without reading the novel.
As I'm not familiar with this specific 'zettai ni yatte wa ikenai isekai shoukan novel', there's no way for me to determine the main characters. It could be a typical isekai setup where there's a young male or female protagonist who gets summoned to the other world and has to face various challenges, but without reading it, this is just speculation.
As the title implies, Haru is probably a central figure. There might also be other characters in the new world that Haru meets. For example, there could be a wizard or a knight who helps or hinders Haru's journey. However, without reading the novel, it's difficult to say for certain who all the main characters are.
There's no easy way to tell if'read isekai wa smartphone to tomo ni light novel' is popular just from this title. Some light novels in the isekai genre with unique concepts like this can gain a large following, but it also depends on how well it's written, how engaging the characters are, and if it gets good reviews. If it has been well - promoted and has elements that appeal to a wide range of readers, it could be popular, but without more information, it's hard to say.
Well, 'isekai wa smartphone to tomo ni' as a light novel could be about a protagonist's adventure in a different world. The smartphone part is interesting. Maybe it gives the main character some unique abilities or ways to interact with this new world. It could be that the story focuses on how the character uses modern - day technology in a fantasy setting, like using the smartphone for communication, information gathering, or even as a weapon or tool in this isekai world.
I don't know the main characters as I haven't read this light novel. You could try looking for reviews or summaries online to find out.
Typically in a light novel series like 'isekai mahou wa okureteru', the main character is someone who has been transported to another world and has to adapt to the new environment. In volume 9, this main character is probably still the focus, and they may have a group of friends or comrades that they've met along their journey. However, new important characters could also be added to the mix to drive the story forward, perhaps a powerful wizard or a mysterious being from a hidden part of the isekai world.