I don't have enough information to specifically say who Roman Coleman is in this 'true story'. It could be an ordinary person with a unique experience, or perhaps someone who has made an impact in a particular field but is not widely known outside of the context of this story.
The Roman religious origin story had a profound impact on Roman society in multiple ways. Socially, it provided a common set of beliefs that united the people. Everyone participated in religious festivals, which created a sense of community. Politically, the religious leaders had influence. The pontiffs could sometimes sway political decisions based on religious beliefs. Economically, the religious practices required resources. For example, the sacrifices involved the use of animals and other offerings, which affected trade and farming.
Well, I'm not entirely sure if 'Roman Esquire' is a true story. There could be elements of truth in it, but it might also have fictional parts added for the sake of the narrative. It really depends on the context and the research done on it. Maybe it's a story that was inspired by real events and then embellished a bit to make it more interesting.
Roman Charity is based on a legend, not an actual documented true event. So, in a strict sense, it's not a true story as we might think of it in modern terms.
The Legio III Gallica is another interesting one. In fictional works, they can be shown as being part of important military campaigns in the Roman east. They had a long history and were involved in many battles, which makes them a great subject for historical fiction writers to explore their stories, such as their role in the Roman expansion in the eastern regions.