You are missing the point that several people have been trying to make.  These spoilers are completely unneeded.  The main page isn't supposed to include summaries for every single character in a series, especially when it has as many characters as Umineko.  In cases where too many characters are being included on the main page, it is proper to make a seperate page for characters and leave only the main characters on the main page.  That would be the Ushiromiya family, the servants, and Beatrice.  Also, just because you can include spoilers, does not mean you should go overboard.  Spoilers like "George has an interest in Shannon" or "Maria seems at times to have a darker side" are perfectly fine, but spoilers like "Eva becomes a witch in Episode 3" or "Kanon was created by Kinzo" are not necessary on the main page character summaries.  What good is Wikipedia as an encyclopedia if people are too afraid to read it for anything involving a story?