Maybe there are some lead animals like an old and wise owl that gives advice about the bridge, and a strong beaver that actually helps build or repair the bridge. There could also be a curious little mouse that discovers the bridge first.
The main idea might be the journey of the animals related to the bridge. Maybe it's about how they overcome obstacles associated with the bridge to reach a new place.
There might be a builder of the bridge as one of the main characters. The story could focus on their motivation for building the bridge, their struggles during the construction, and how the bridge impacts their own life as well as the lives of others. They might have a backstory that is revealed through the short story.
I don't know the 'the bridge game story' well enough to say who the main characters are. But they could be the bridge players, like an old man who is very skilled at the game, a young woman who is learning, and maybe a couple who play together often.
I'm not sure as I haven't read the specific 'on the bridge short story', but it could be a lone traveler who is the main focus.
In 'the animal story', the main characters could be some small insects such as ants. The story might focus on how they work together in a colony, their division of labor, and how they face threats from other creatures. It could also be a story about a single large animal like an elephant, and its journey through the African savannah.
Jess's parents are also part of the story. His father is a bit strict and works hard to support the family. His mother is busy with taking care of the household and the children. Their presence and the way they interact with Jess influence his character development throughout the novel.
I don't know the specific 'under the bridge the true story', so I can't tell who the main characters are.
The main characters are usually the troll and the traveler who wants to cross the bridge.
I'm not sure specifically who the main characters are without more information about this 'Bridge Spies' true story. There could be intelligence agents, double agents, or regular people caught up in the espionage events related to the bridge.
Since I'm not familiar with the 'the bridge partner short story', it's impossible to determine the main characters precisely. But given the title, the two individuals who are partners in playing bridge are most likely the main focus. There might be additional characters like the people running the bridge club where they play, or friends who introduce them to the game. These secondary characters could play important roles in shaping the story and the relationship between the main bridge partners.