I don't know for sure who Rossi is in this story without more information. He could be an ordinary person who found himself in extraordinary circumstances, or he might be a professional in a certain field like a journalist or a detective.
One common theme is friendship. Since they are both engines in the same railway universe, stories often explore how they support and care for each other. For example, Thomas might get into trouble and Edward comes to his rescue. Another theme is adventure. They could go on exciting trips together or explore new parts of the railway network.
Perhaps there could be a story where Thomas and Edward compete in a friendly race. Along the way, they both learn important lessons about sportsmanship and friendship. For example, when one of them has a minor accident, the other stops to help, realizing that winning isn't everything.
In fanfiction, they could face a big crisis together, like a major bridge collapse that blocks the railway. As they work side by side to fix the problem and keep the railway running, their bond of friendship would grow stronger. They might have to rely on each other's unique skills, with Thomas being fast and Edward being strong.
A great place to start is Archive of Our Own (AO3). It has a wide variety of Thomas and Edward fanfiction. You could look for ones that focus on their friendship. For example, stories where Edward gives advice to Thomas based on his own experiences, which can be really heart - warming and show the depth of their relationship.
One key event was his birth in London in 1878. Another important part was his shift from mainly prose writing to poetry. And of course, his enlistment in World War I was crucial. His death in 1917 during the war was also a significant event in his life story.
Edward Thomas was born in 1878 in London. His life was filled with the pursuit of literature. He started out writing prose but his poetry became more well - known later. His decision to enlist in World War I was a major part of his life story. In the military, he faced the harsh realities of war. His poetry during this time was a mix of his love for nature, which he had always held dear, and the new and tragic experiences of war. For example, his descriptions of the English landscape in his poems were sometimes contrasted with the destruction he witnessed in the war. His life was cut short, unfortunately, as he died during the war in 1917, but his works left a lasting mark on English literature.
There might be a fanfiction where Edward has to deal with a strange malfunction that gives him unique abilities. For example, he could suddenly be able to understand the thoughts of all the other engines. This would lead to some very interesting interactions and situations as he tries to keep this a secret while also using it to help his friends.
One interesting story could be about Edward and Emily working together to rescue a stranded train. They use their combined strength and smarts to get the job done.