The main characters are Tsukasa Mizugaki, who starts working at SAI Corporation and is initially a bit naive but grows throughout the story. Isla, a Giftia, is another main character. She has a calm and gentle personality. And there's also Michiru Kinushima, who is Tsukasa's co - worker and provides some comic relief and support in the story.
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.
The main themes include mortality and acceptance. The Giftias in Plastic Memories light novel have a set lifespan, and the characters have to come to terms with their impending 'deaths'. This forces them to face the idea of mortality not just for the Giftias but also in a more general sense. Also, there's the theme of humanity. Despite being androids, the Giftias display very human - like emotions and behaviors, which makes the readers question what it really means to be human.
The themes include the value of time. In the Plastic Memories Visual Novel, the limited lifespan of the Giftias makes time a crucial factor. It also has a theme of acceptance. Characters need to accept the reality of the Giftias' lifespan and the changes that come with it.
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.
Since I'm not familiar with the 'Fake Plastic Love' novel, I can't name the main characters. But generally in a novel about love, there could be two lovers, perhaps with some supporting characters like friends or family members who either help or hinder their relationship.
Perhaps there is a jaded protagonist who has been through many relationships that felt fake, and they meet someone new and have to figure out if this is real love or just another 'fake plastic love'. There could also be a secondary character who represents the allure of the fake love, like a friend who is only interested in relationships for status or money.
As I haven't read or experienced 'plastic love visual novel', I can't name the main characters. However, in most visual novels, the main characters are usually those whose relationships are central to the story, especially in a story about love. So they could be characters who are involved in the complex 'plastic love' situations.
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.
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.