[Comprehensive British and American] Wanderer of the Batcave

This book is a mess, I can't continue writing it, so please don't enter. Berg Bennett was a new soldier who joined the army. He encountered an enemy attack during a night watch. He raised the alarm and joined the battle. The battle ended in failure and other soldiers died. He was also classified as an ordinary soldier who died at the hands of the enemy. A young man with simple interpersonal relationships, only Steve and Bucky who had not yet been injected with the serum were sad for him. But in fact, he was possessed by an unknown creature who wanted to invade his body and cause massacre. Unfortunately, although he is an ordinary person, he has something that surpasses others, and he has a strong will. The powerful evil being thought it would be easy to escape the seal, but was trapped in his own body by Berg but was restrained. In that backward era, he knew that no one could kill him. Just think that even a small ordinary person could be great. He chose to take him to death together, struggling in the whispers of chaos and overwhelming madness, looking for death. He stayed away from people, in order not to bring danger to the people gathered if he lost control, and sought death alone. Wandering in various dangerous places, he trapped Him, and was transformed by the remaining energy. Without fear of death or hunger, he wandered like this and trapped Him for more than seventy years, until he came to the age of superheroes. Batman would disappear for a short period of time. The third Robin noticed this, so under the guidance of Batman's eyes, the Robins discovered an admirable soldier sleeping deep in the Batcave. The protagonist is a native, and I don't know the plot. Before joining the army, he was a good friend of Dou Sprout. The CP is Batman. Purpose: I want to write a deeper story