The main characters might be a diverse group. It could include an old wise man who has been in the park for a long time and knows all its secrets. There might also be a young girl with a curious nature, always eager to explore new areas of Mirai Park. And perhaps a friendly dog that accompanies them on their adventures.
Given the lack of details, it's difficult to determine the main characters precisely. However, they could be a family that moves near Mirai Park and gradually discovers the magic within it. The parents could be protective yet open - minded, and the children could be the ones leading the exploration, with each family member having their own role to play in the story, whether it's facing challenges, making new friends in the park, or uncovering the park's history.
Since I don't have more context about this 'mirai park original story', it's hard to say exactly. It might be a story of a young protagonist who stumbles upon Mirai Park and finds it to be a place full of wonders. There could be talking animals, hidden paths, and a mystery to solve. It could also be a story that aims to teach some moral lessons through the experiences that happen in the park.
There is a couple who are the parents of the missing boy. Their names are Paul and Amanda Kirby. Also, there is Dr. Alan Grant, who is an expert on dinosaurs and is reluctantly drawn into the adventure on the island.
I don't know specifically as I haven't read it. But usually, light novels have a central protagonist, perhaps a young person with some special abilities or qualities.
In some fanfictions, the previous Hokages could be main characters in relation to Mirai Sarutobi. For example, the First Hokage Hashirama Senju's spirit could appear to give Mirai some wisdom or a special power. Or the Third Hokage, being from the Sarutobi clan as well, could have left some hidden knowledge that Mirai discovers, making the old Hokage an important part of the story.
In the 'Mirai Nikki Light Novel', Yukiteru Amano is central. He's an ordinary - seeming boy until he's plunged into this crazy diary - based battle. Yuno Gasai is a very prominent character as well. She's obsessed with Yukiteru and is a force to be reckoned with in the fight. Then there's Minene Uryuu. As a terrorist - turned - diary - holder, she brings a different kind of chaos to the story. These characters' interactions drive the plot forward.
The main characters could be a group of mischievous monkeys. They are always up to something, like stealing food from other animals or playing pranks on the visitors. Their antics could form the main plot of the story.
The main characters are obviously Mirai Trunks and Pan. Mirai Trunks is from a future timeline and has unique abilities and experiences. Pan is Gohan's daughter, and she is strong - willed and brave. In this fanfiction, they are the central focus, and the story likely revolves around their relationship, whether it's a friendship or something more romantic.
Perhaps there is a young couple. They could be walking hand in hand, chatting and enjoying each other's company in the park on Sunday.
Since we don't have much detail, the main characters could be a local artist and a visitor to Echo Park. The artist could be showing their work in one of the local galleries, and the visitor is attracted to both the art and the artist. They start to talk, and a love story begins. Or it could be two neighbors in Echo Park who have known each other for a while and gradually fall in love.
Since I don't know the exact story, if it's a traditional type of story, the main character would be the king. There might also be people who work in the car park or use the car park regularly, like car park attendants or drivers, who interact with the king.