In many light novels like 'sweet home', the main characters are a diverse bunch. There could be a male lead who is physically strong and good at combat. There might also be a female character who is intelligent and uses her wits to solve problems. And don't forget about the side characters who play important roles in supporting the main characters, like the neighbor who has some special knowledge or skills that come in handy during the events in the story.
The main character is a young man. There are also other residents in the apartment complex who play important roles.
In the 'sweet home graphic novel', Hyun Cha is a key character. He is a young man dealing with his own demons. There are also other important characters like the other residents of the apartment building. Each of them has their own backstory and characteristics. For example, some are more experienced in dealing with difficult situations, while others are new to this kind of horror. They all play important roles in the overall story as they face the threats of the monsters together.
I'm not entirely sure about the main characters in 'Sweet Home Visual Novel' as I haven't played it in great detail. But usually, in a visual novel, there is a protagonist around whom the story revolves. There might also be some supporting characters who play important roles in the protagonist's journey, like friends, family members, or antagonists.
Since it's a walkthrough of a sweet home in a visual novel, the main characters might include the homeowners. There could also be a friendly neighbor who often drops by and plays an important role in the story. Maybe there's a pet in the home that is also considered one of the main characters and has its own little story arcs within the overall narrative of the visual novel.
I don't have specific information about the main characters in this visual novel. But usually, in a story about 'home', there could be family members like a mother, father, and children as main characters.
There could be a young couple as the main characters. They are excited to start their new life in a new home but end up facing the horror elements in the game.
I'm not entirely sure as there could be many characters in 'Sweet Home Horror Story'. But usually, there is a protagonist who has to face the horror within the home setting.
The main character is Chi, the kitten. And the family members who take Chi in are also important characters.
There are often some supporting characters like the hero's or heroine's best friends. They play important roles in giving advice, creating misunderstandings or helping the main characters solve problems. For example, the best friend might accidentally say something that causes a rift between the hero and the heroine, but later helps them get back together.
Unfortunately, without more research or prior knowledge, I can't tell you who the author of the 'home sweet home novel' is. It could be an indie author or a new writer trying to convey their thoughts on the idea of home through this novel.