As I don't know the details of the 'hot dex story', I can't say who the main characters are. There could be a character named Dex who might be the central figure, but without more information, it's impossible to be certain.
If the 'hot dex story' is a mystery - type story, there could be a detective - like character named Dex as the main character, with other supporting characters like his sidekick or the people he is investigating. However, if it's a different genre, say a love story, then Dex could be one of the lovers, and there could be other characters such as their friends or family members involved in the story.
I'm not sure specifically what the 'hot dex story' is as the term is rather ambiguous. It could be a story related to a 'dex' which might refer to a Dexter or a Pokedex in some fictional context. Without more information, it's hard to say for sure.
The main characters are Fiona and Dex, of course. Fiona is likely to be a central figure in the story, with her own set of characteristics, dreams, and flaws. Dex is also important. He might be the male lead who has his own story arc that intertwines with Fiona's.
Hot dex stories might also be related to some sort of technological dex, like a device's database index. So it could be about how developers found and fixed bugs by exploring the dex of the software. There could be stories of finding security loopholes through examining the dex of a system's access control, which led to major improvements in security.
The main characters are Ash and the Dex Holders.
As we have no information about the 'hot pulse story', it's impossible to determine the main characters. They could be scientists if it's a scientific - based story, or they could be ordinary people in a story about a natural phenomenon like a heat wave. In a fictional adventure story, they might be brave heroes or heroines.
Perhaps the main characters are the visitors to the hot spring. They could be tourists from all over the world, each with their own reasons for coming to the hot spring. Some might be there for the health benefits, some for the novelty, and others just to have a unique experience. It's also possible that there are local characters who are regulars at the hot spring and play important roles in the story, like an old man who has been coming to the hot spring for decades and shares his wisdom with the other visitors.
Often, there is a young and plucky protagonist. This character is new to the world of adventure but has a lot of heart and determination. They learn and grow throughout the story, facing challenges head - on and making friends and enemies along the way.
As we don't know the specific 'hot read story', it's impossible to name the main characters. However, in a typical story, the main characters are usually the ones who drive the plot forward. They could be heroes, villains, or ordinary people caught up in extraordinary circumstances. For example, in a fantasy 'hot read story', the main characters might be a young wizard and his friends on a quest to save their magical world.
As I don't know the details of the 'hot chachi story', I can't say for sure who the main characters are. But if Chachi is in the title, Chachi is likely to be one of the main characters. There may also be friends, family members or antagonists depending on the nature of the story.
Since we have no idea about the exact 'hot buns story', the main characters could be a family. For instance, a mother might be making hot buns for her family and the story could revolve around the family's reactions, their anticipation of eating the hot buns, and the love and warmth associated with sharing the hot buns within the family.