Board Thread:General Discussion/@comment-39731128-20190607172840/@comment-24767363-20190608035042

I presume since Bruno was close to Polpo and Polpo assigned the members to Bruno that the part 5 main characters all took the test. Since Diavolo only bought 5 arrows and kept only one, that means Polpo was the only one with an arrow.

As for the other tests, it could be something lesser since most of the people joining wouldn't be able to gain stands through the arrow or it would be something that could trigger a person's stand ability to come out if they are able to achieve such.

I would assume those with stand abilities are a minority, but it's impossible to truly tell