One way is to have their values and beliefs be completely opposite. For example, the protagonist might believe in justice and fairness, while the villain only cares about personal gain at any cost. Also, you could introduce a shared past or connection that adds complexity to their conflict.
I'm not sure which novel 'the man in the brown suit novel' is specifically. There could be many novels with such a title or a similar description. So, unfortunately, I can't tell you the author.
I'm not entirely sure as I haven't read it in detail. But generally, it might be about a man who is characterized by the brown suit he wears, and perhaps his adventures, relationships or a mystery he is involved in.
Yes, there are some interesting ones. You can start by looking on fanfiction websites like Archive of Our Own. Some fanfics in this vein might explore unique character interpretations of Jaune Arc in the context of the 'old man of the mountain' concept, adding new layers to his character and the story.
The Arc Reactor was initially created by Tony Stark to keep the shrapnel in his chest from reaching his heart. It was a miniaturized version of a larger reactor he had developed. It became a power source not only for his survival but also for his Iron Man suits, providing the necessary energy for various functions like flight, repulsor blasts, etc.
In some comic arcs, Iron Man removing the arc reactor is indeed canon. This action might be driven by various factors such as plot twists, character growth, or to introduce new challenges for the hero.
I'm not sure specifically which 'North Carolina man' in the 'Karla Brown story' without more context. There could be many individuals involved in a story from North Carolina related to someone named Karla Brown.