As there is no additional information about this 'luisa graphic novel', it's really difficult to say who the author might be. It could be an independent artist or a well - known name in the graphic novel industry. There are so many people creating graphic novels these days that it could be anyone.
I'm not sure specifically as there could be many 'luisa graphic novels' out there. It might be about a character named Luisa's adventures, her relationships, or her struggles in a fictional world. Without more information, it's hard to tell the exact plot.
I don't think it is. Usually, such names are made up for fictional works and don't have a real-life basis. But you could check with the creator or official sources for more accurate info.
They might be really surprised. Some characters could be flattered by the positive portrayals in the fanfiction. For example, Mirabel might be happy to see different interpretations of her story and how she's seen as a hero in some fics.
Encanto is an original story. Disney's team of writers and animators came up with the concept and brought it to life on the big screen. It's not a adaptation or retelling of another story.
Indeed, Encanto is based on a story. The creators combined different imaginative concepts to bring this story to life, featuring themes of love, unity, and self-discovery within a magical setting.