Board Thread:Manga Discussion/@comment-28702329-20180923115150/@comment-32608616-20181009121513

As our dear Gappy can steal things, the JoJolion's villain must have the ability to give things to other people.

Following this theory, this villain can be extremely terrible and difficult to defeat, since he could make other people sick or give Stands to them. (Just like Kira's father at DIU, giving Stands to some people to defeat Josuke.)