Another theme could be admiration. All Might is a symbol of hope and David Shield, being in the hero support field, might look up to him. Fanfictions could explore how Shield's admiration for All Might affects his work and decisions. For instance, he might be inspired to create more advanced support items because of All Might. There could also be themes related to their different roles in the hero world and how they bridge the gap between science and heroics.
Some fanfiction might focus on their possible friendship or mentorship. For example, a story could be about how David Shield's scientific knowledge and All Might's heroism interact, perhaps with Shield creating some new support item for All Might. Another aspect could be their past interactions and how they influenced each other's development in the world of heroes.
David was this young lad who was taking care of his father's sheep. He was not from a military background but was chosen by God. In the story against Goliath, he showed remarkable bravery. He trusted in God's power and his own skills, like his ability with a slingshot, which ultimately led to his victory over the giant.
I'm not sure who David Fuller is in this story. There are so many people named David Fuller. He might be a character who had an important role in a particular event or a person with a unique personality in a family or social group. But without more context, it's difficult to be precise.
There's not enough given to know precisely who John David is. He could be a character in a family legend. For example, in a big family, there might be stories passed down about a great - uncle John David who had some kind of secret that affected the whole family's history. Or he could be a new character in a story being created, and the 'secret' part of the title is just to pique the reader's interest while his identity is slowly revealed throughout the story.
David Holmes in 'David Holmes the real story' could be a person with a complex and fascinating life. He might be involved in a historical event that has been overlooked until now. Maybe he was part of a movement, a revolution, or a cultural change. His story could be full of twists and turns, but we need more details to really understand who he is.
I don't know who David Perez is in this context. He could be anyone - an ordinary person with an extraordinary story, or someone well - known in a specific community or industry.