Well, there are also those characters who might be a bit shocked or confused. Take Levi from Attack on Titan. He's a very serious and no - nonsense type of character. If he were to read some of the fanfic about him that deviated too much from his own self - perception, like being made into a comical or overly emotional character in the fanfic, he might be taken aback at first. But then he might also realize it's just a different interpretation and not take it too seriously.
It depends on personal preference. If you like visual and audio entertainment, the anime might be better for you as it brings the story to life with animations and voice acting.
It depends. Sometimes the manga can expand on character development or introduce new plot elements not shown in the anime. But it's not always a straightforward comparison.
The Absolute Duo anime covers a significant portion of the light novel, but not all of it. Some key plot points and character developments are included, but there are still aspects from the original novel that haven't made it to the screen.