User blog comment:IamJakuhoRaikoben/Chapter 493: The White Dragneel, Review./@comment-24951162-20160711181713/@comment-1359322-20160712022801

There could be several reincarnations of the Spriggan 12. Clearly God Serena joined the Spriggan 12 for a short period of time, his predecessor might just reclaim his position as a Spriggan again, same to other Spriggan who are currently MIA.