You could also develop its character based on its experiences with the environment. If it has to struggle to find food in a certain area of Jurassic Park, it might become more resourceful and determined. It could start to explore new areas and develop a sense of curiosity about its surroundings.
The relationship can be developed through mutual need. For example, if the human is lost in the dinosaur's territory, the T - Rex could initially see the human as prey but then realize the human has some unique skills, like making fire or using tools. This could lead to a truce. Or if the T - Rex is injured, the human could use their medical knowledge (assuming some sort of knowledge transfer in the story) to help the T - Rex, and in return, the T - Rex protects the human from other threats.
Well, here's a story. There was a lonely T - Rex. One evening, as the sun set, he met an old wise turtle. The turtle told him stories about how important sleep was. The T - Rex was intrigued. That night, as he lay down, he thought about what the turtle said. He realized that he needed to rest just like all the other creatures. So he closed his eyes and had a peaceful sleep. This shows that even a big and strong T - Rex can benefit from a good night's sleep.
Once upon a time, there was a little T - Rex named Timmy. At bedtime, Timmy didn't want to go to sleep. His mother told him a story about the brave T - Rexes of the past. She said that long ago, their kind ruled the land. But they also knew when to rest. As she told the story, Timmy started to feel sleepy and finally closed his eyes.
A T - Rex short story could be like this. There was a young T - Rex who was always curious. He wandered away from his family's hunting ground. He came across a strange shiny object. It was a piece of a meteorite. The young T - Rex didn't know what it was but was fascinated. While he was examining it, an older and wiser T - Rex came by and showed him that it was not food. So the young T - Rex learned something new that day.
They could be ordinary people whose lives were interesting enough to be made into a story. Maybe they were local heroes in their town, or they had a unique relationship that caught the attention of someone who decided to tell their story. Or perhaps they were involved in some kind of historical event or movement that made their story worth sharing.
I'm not familiar with a Tammy Lansing. She could be an independent or relatively unknown writer, especially if she is associated with a niche genre like 'erotic stories'. There might be more information available in specific literary communities or among readers of that particular type of literature.