User blog comment:Kaido King of the Beasts/Chapter 865: Mother, Into Your Hands I Commit My Spirit/@comment-305469-20170511191622/@comment-24442815-20170511234258

Oda is a master of plot twists. For all we know Pekoms could appear out of nowhere after the flashback and make the Firetank Pirates miss or the weapons don't harm her at all. She still has yet to open the treasure box from Fishman Island which is supposed to play a role in this arc.