Board Thread:Off Topic/@comment-25396609-20160207042716/@comment-27618538-20160207214632

Ah, okay, just had to be sure before I continued my editing. And to be honest, that was just a thought I had on a whim- admittedly I have been getting defensive about the idea when the other two were easier to get through, sorry about that.

I can see one reason perhaps: the semblance is an extension of the soul, one's own soul, and even amongst family members, they are not completely identical. Winter's Gylphs seem to be more focused on summoning and effects, while Weiss has the summoning too but also more elemental functions and the like- especially when dust is involved.