If we assume it's based on the Greek myth, Pandora could be the main female character. For a male character, it could be Epimetheus, who was Pandora's husband. In a more modern adaptation of the 'pandora love story', the main characters could be entirely new creations. For example, a Pandora - like character who is an artist and a man who is a journalist, and their different worlds collide to form a love story.
In a general 'pandora love story', Pandora is likely to be a central figure. Her character might be the one who drives the plot with her actions and decisions related to love. As for other characters, there could be a wise old woman or man who acts as a guide in her love journey, or a rival in love, a person who also desires Pandora's love and creates conflict in the story.
The main characters in the Pandora story are Pandora herself, Zeus who was the king of the gods and masterminded the whole thing, Hephaestus who created Pandora, and Epimetheus to whom Pandora was given.
I'm not sure who the main characters are as I haven't read the Pandora Star novel. But they could be scientists, explorers, or people with special abilities who are drawn to the Pandora Star for some reason.
In 'Pandora Revealed High School Story', Pandora is the central figure. There may be a group of friends around her. For example, there could be a boy named Jake who is good at sports and is always there to support Pandora physically. And then there might be a girl named Mia who is really smart and helps Pandora figure out the more intellectual parts of the mystery. There could also be an antagonist, like a bully named Max who tries to stop Pandora from revealing the secrets of the high school.
I'm not sure who the main characters are without reading it. But likely Pandora herself would be a main character as it's based on her box.
Oz Vessalius is one of the main characters. He is a young nobleman with a mysterious past. Then there's Alice, a powerful being. And Gilbert, who is loyal to Oz.
Pandora in the Pandora box story was a figure made by the gods. She was given a box and her actions regarding that box had a huge impact on the world. Her character represents human curiosity as she couldn't resist opening the box, despite being warned not to.
Pandora was the first woman in Greek mythology. She was created by Hephaestus on the orders of Zeus.
I don't have specific information on this visual novel, so I can't say for sure who the main characters are.
Obviously, Danny Phantom and Pandora are the main characters. Danny is the one being raised by Pandora.
Since I haven't read the Pandora Hearts Cacus Race Novel, I can't say for sure. However, in the Pandora Hearts series, there are characters like Alice who is quite significant. In this novel about the Cacus Race, there could be characters directly related to that race who play the main roles, perhaps a Cacus Race leader or a young Cacus who has some special destiny within the story.