It's hard to say without reading the story, but it could be a marine biologist who is researching whale sounds.
There could be a group of sailors who encounter the whale sounds during their voyage. They might be the main characters, with the whale sounds being a central element that changes their view of the ocean and its inhabitants.
As I don't know the exact 'the whale short story', if it's a typical one, the main character would likely be the whale itself. It could be a specific type of whale like a humpback or a blue whale.
It could be about various things. Maybe it's about a scientist who studies whale sounds and discovers a unique pattern in them that leads to a new understanding of whale communication.
I'm not sure exactly as the details about the story aren't fully given. But perhaps there could be a lonely wanderer who is constantly surrounded by silence and has to face it. This character would be one of the main ones.
There's also Travis, who is the guide on the time - traveling expedition. He is responsible for ensuring the safety of the group and following the rules of time travel. Another important character is Lesperance. He has a role in preparing the time - travel journey and scouting out the dinosaurs for the hunt. These three characters play crucial roles in the story as they are directly involved in the time - travel adventure and the events that unfold because of it.
In 'The Sound of Thunder' short story, Eckels is the main character. He is a man full of bravado at the start, excited to go back in time and hunt dinosaurs. The safari guide Travis also plays a crucial role. He is the one who warns Eckels about the potential consequences of their actions in the past. There are other minor characters too, but Eckels and Travis are the ones who drive the story forward with their actions and decisions.
The main character is the inventor of the sound machine. There's also a doctor who the inventor tries to talk to about his discovery.
It's possible that there is a protagonist who is new to the area and the story is about their experiences during summer. They might meet different people and get involved in various activities that are characteristic of summer, like going to the beach or having picnics, and these interactions shape the story and the other characters in it.
The main character is Eckels. He is the one who signs up for the time - travel safari to the past to hunt dinosaurs.
Since I haven't read it, I'm not sure. But it could be a person and a whale, or perhaps a group of people who have a relationship with the whale.
Since we don't know the specific 'the whale true story', it could be the whale itself as a main character. If it's about human - whale interaction, then the people involved like the researchers, fishermen, or whale - watchers could be the main characters.