Perhaps there is a detective - like character. Since the title has 'Memories' and 'Night', there could be some mystery involved. This detective - like character might be investigating something that is related to the memories of the night. And then there could be a witness or a victim, whose memories of the night are crucial to solving the mystery in the story.
I'm not sure exactly as I haven't read the 'Memories of the Night Novel'. But usually, in a novel, there are protagonists who drive the story forward. It could be a person who is haunted by their memories of the night and is on a journey to either confront or understand them better.
I'm not sure as I haven't read the novel specifically, but typically in a vampire novel, there would be a vampire protagonist. Maybe there's an old and powerful vampire who is the source of envy for others. And there could be a human character who gets involved in the vampire world and becomes part of the story related to envy and memories.
I don't know as I haven't read it. But typically in a novel, the main characters could be an individual on a personal journey, or perhaps a group of friends or family members.
I don't have specific information on this visual novel, so I can't say for sure who the main characters are.
Since I don't have specific information about 'memories visual novel', it's hard to say exactly. However, in a general sense, there could be a character who is an old person reminiscing about their youth, so that old character would be a main character. There might also be characters from their past, like friends or family members, who are important in the exploration of the memories.
Often, there would be an antagonist or a character who is somehow related to the secrets and tries to prevent the protagonist from uncovering them. This could add conflict to the story. They might have their own motives for keeping the secrets buried, like protecting their reputation or a certain situation.
One of the main themes could be mystery. The night often holds secrets and in a novel titled 'Memories of the Night', it might explore the unknown events that occurred during the night. Another theme could be reminiscence, as memories play a central role. It might be about looking back at past events that took place at night and how they shape the present or future of the characters.
I'm not entirely sure as it depends on the specific 'Summer Memories Visual Novel'. But usually, there could be a young protagonist, perhaps a teenager, who is experiencing the summer in a unique way.
Since I haven't read it, I can't determine the main characters. But usually in a visual novel, the main characters are those whose stories are central to the plot. They could be people who have had some sort of life - changing bad memories, like a survivor of a disaster or someone who has been through a difficult relationship.
I'm not sure as I haven't read the novel. But typically, main characters are those who drive the story forward. They could be people with extraordinary memories or those who are on a journey to recover lost memories.
Tsukasa Mizugaki is one of the main characters. He is a new employee at SAI Corporation. Isla is also a very important character. She is a Giftia with whom Tsukasa has a special relationship.