I don't know as I haven't read it. There could be a character who discovers the letter ghost, perhaps a young person who is curious and brave.
Without reading the 'the letter ghost visual novel', it's hard to say exactly. But in a typical story like this, there could be a main character who is the recipient of the letters from the ghost. There may also be a character who has some prior knowledge about the ghost or the letters, like a local historian or an old hermit. And of course, the letter ghost itself could be considered a main character in a sense, as it drives the story forward through its letters.
It's hard to say for sure, but one possibility is the old lady who lives in the abandoned house. Her backstory and strange encounters could indicate that she's the ghost.
Since I'm not familiar with this visual novel, it's hard to say who the main characters are. But in general, in a visual novel that focuses on letters, there might be a sender and a receiver of the letters as main characters. Maybe a young writer who sends out letters seeking adventure and an older, wiser person who receives them and offers advice.
Since the title mentions Isabella, she is most likely one of the main characters. But without reading it, it's hard to say who else might be a main character. There could be a friend or a love interest of Isabella.
I'm not sure who the main characters are in 'johannes the letter visual novel' since I haven't played or read it. But it's safe to assume that Johannes is one of the main characters, given the title. There may also be other characters like friends, family members, or antagonists that interact with Johannes throughout the story.
There could be an old hermit - type character who has some knowledge about the letter's origin. The main characters might seek his help to understand what's going on. Additionally, there could be a villainous character who is somehow related to the letter and is causing all the horror, perhaps a long - lost relative of someone in the story who has a grudge and is using the letter as a tool for revenge.
The protagonist is one of the main characters. And of course, his pen - pal whose mystery he is trying to solve. There are also other characters in the town where he goes to investigate, but the specific details about them can be discovered as you play through the visual novel.
I don't have information on the specific main characters in this visual novel as it's not a widely known one to me. It could be a young person who is on a journey to discover their family's past through the letters.
I don't know the specific main characters as I haven't played or read it. But they could be a person haunted by the ghost and someone who tries to help them deal with the situation.
I don't have the exact information. But it could be the person who discovers the ghost on the rooftop as one of the main characters. There might also be other characters like people living in the building who are affected by the presence of the ghost.
I'm not sure specifically as I haven't read it. But generally, a visual novel often has a story with characters, plot twists, and interactions. Maybe 'the letter ghost visual novel' is about a ghost related to letters in some way, like a ghost that communicates through letters or is haunted by letters.