User blog comment:IamJakuhoRaikoben/Chapter 496: Forward, Review./@comment-1776824-20160801144847/@comment-5303512-20160801154435

I don't think so, if it were just six, then it would be just the right size for the OS arc, the army is just the equivalent to the random guild forces from the past, just the strength difference due to inverse power progression. Because the length of fights have not changed sin the end of the Fairy Tail Fighting Festival Arc.

The only real difference between the Spriggans that he focus on and those he pays less attention to are that they have back stories, that's pretty much it. And I am still waiting on what is their significance that Hiro said they would, or perhaps the number "12". And until the last Spriggan falls, I will on the look out for it.