User blog comment:Crimson Storm Mich/Future Units Preview v2/@comment-32111784-20170812082250/@comment-31903729-20170812170810

That's true, VerdantGreen, but these seem more like units. The only difference about the Summoner between weapons is the armor/clothing and stance. This "Summoner Weapon" batch has drastic differences between each, so it's more likely the original wielders of the weapons we collect, like Sol Badguy's Junkyard Dog and the Sphere Founder batches of long ago, maybe even manifestations of the weapons themselves.