The main character in 'the dark night visual novel' is often portrayed as brave. For example, when faced with danger in the form of strange creatures in the dark, they don't back down easily.
Without having read 'the night visual novel', it's difficult to name the exact main characters. But common character archetypes in such a night - themed story could be a night owl who loves exploring the city at night, a vampire - like character if it has a touch of the supernatural (although not all night - themed visual novels would have this), or a security guard who witnesses strange things during his night shifts. These are just speculations based on the general idea of a story centered around the night.
Not having read the 'dark night ranger novel', it's difficult to name the main characters accurately. However, we can assume that the dark night ranger is a central figure. There might be an antagonist, perhaps a powerful sorcerer or a bandit leader who opposes the ranger. And there could be some friends or mentors of the ranger, like an old wise man who gives him advice or a young apprentice who follows him around.
In 'fate night visual novel', Shirou Emiya stands out as a main character. He has a selfless nature and a strong sense of justice. Saber, a female heroic spirit with a regal presence, is often by his side. Then there's Archer, whose identity is a mystery at first. Their fates are intertwined as they battle in the Holy Grail War, and each character's personality and abilities greatly influence the flow of the story.
I'm not sure specifically, but there might be the dark angel itself as a main character. There could also be a human who has some sort of connection with the dark angel, like a friend or an enemy.
I don't know the specific main characters as I haven't experienced this visual novel. However, it could have a protagonist who is the one searching for the 'light in the dark'. There might also be a mentor - like character who guides the protagonist towards that light.
The main characters in 'light in the dark visual novel' could be diverse. There might be a character who has lost their way in life, representing the 'dark' part of their existence. Then there could be another character who enters their life and becomes the 'light'. For instance, a lonely artist who has lost inspiration (the dark) and then meets a muse - like figure (the light). Or it could be a group of friends who are trying to survive in a difficult situation together, and each of them plays a role in finding the 'light' within that darkness.
I'm not sure specifically, but they might be complex individuals dealing with their aloneness in different ways. Maybe some are introverted by nature and embrace it, while others are lonely against their will.
There may also be a group of friends who all have different fitness goals. One might be aiming for weight loss, another for strength gain, and they support each other throughout the story. They often have different personalities, like one being really outgoing and always cheering everyone on, while another is more introverted but still a valuable part of the group.
As I haven't had the chance to read 'On a Night Like This' novel, it's hard to say who the main characters are. But typically, there could be a character whose perspective the story is mainly told from. There might also be other supporting characters that interact with this main character during the night and play important roles in the development of the plot, like a friend, a family member, or a mysterious stranger.
I'm afraid without more information about the 'dark of night story', it's impossible to determine the main characters. However, they might be people with a special connection to the night, like a night watchman or a person who has a secret that only reveals itself at night.