Since I don't know the exact 'monster island novel', I can't say for sure. But usually, there might be a brave hero or heroine who leads the exploration or survival efforts on the island.
Well, in the 'monster island novel', it could have a young protagonist who is on a quest to find something on the island, like a lost artifact or a missing family member. Alongside this main character, there could be a group of misfits - an old sailor with a lot of sea - faring knowledge, a strong - willed woman who is good at combat, and a young boy who has a special ability to communicate with animals (which could be useful in dealing with the monsters on the island). These characters together form the core group that drives the story forward.
It's possible that the main characters are a diverse group. There could be a scientist who is trying to understand the nature of the monsters on the island. A skilled hunter who knows how to track and avoid the monsters might also be among the main characters. And perhaps a mysterious figure who has a hidden agenda but still plays an important role in the escape from Monster Island.
There might be a castaway who has to adapt to the island life. There could also be a group of sailors who end up on the island by accident. Among them, there may be a leader figure who tries to keep everyone in order and find a way to get off the island. Additionally, there could be a local on the island who helps or hinders the outsiders depending on the story's direction.
I'm not sure which Monkey Island novel you specifically mean, so it's difficult to name the main characters. But it could be a pirate as a main character.
It depends on the specific Angel Island Novel. However, often the main characters are immigrants themselves, such as a young Chinese man hoping to make a new life in America, or a Japanese woman with a family she's trying to reunite with.
There might be a character named Ralph. He is more of a thinker and planner, and helps the group make decisions about things like building shelters and finding food. He is good at coordinating with others.
There could be a variety of characters. There might be a strong and resourceful man who is good at building shelters and finding food. There could also be a woman with a kind heart who takes care of the others emotionally, and perhaps a child who brings out the protective side of the other characters.
There could be a group of friends who decide to visit the island together. One of them might be the leader type, always making decisions. Another could be the comic relief, always cracking jokes even in difficult situations. And perhaps there's a more mysterious character whose past is somehow related to the island.
I'm not sure specifically as I haven't read the exact 'Penguin Island Novel', but likely there would be some penguin leaders or important individuals within the penguin community.
There could be immigration officers or officials at Ellis Island as main characters too. They might play a role in determining the fates of the immigrants, and the novel could explore their perspectives, like how they deal with the flood of new arrivals and the rules they have to enforce.
Without having read 'The Island' by Benchley, it's difficult to name the exact main characters. But it's common in novels set on islands to have a protagonist who is a bit of an outsider. Maybe someone who has come to the island to escape their past or in search of something. There could also be a character who is native to the island and acts as a guide or a source of knowledge about the island's secrets.