The Omniscient Reader manhwa is quite faithful. It does a good job of presenting the plot and characters as they were in the original. Some minor details might be tweaked for better visual or narrative flow, but the core remains intact.
It's hard to say for sure. The decision to turn a manhwa into anime involves multiple considerations such as the story's appeal, available resources, and market demand. Sometimes it happens, but not always.
Well, it varies. Some anime comics are very loyal to the source, while others might make significant changes to fit the animation style or story pacing.
The consistency depends. In some cases, the anime sticks closely to the manga, but in others, there might be changes in plot or character development for various reasons like animation style or time constraints.
The Naruto anime is widely regarded as a faithful representation of the manga. It manages to capture the key elements and excitement of the original. Although there are some differences to accommodate the medium of animation, they don't significantly impact the overall experience for fans of the manga.