I feel so silly. I had been photographing a particular dahlia in my garden and labeling the photos as "Crazy 4 Sophie," but on breaking down that bed, discovered it was Sophie's neighbor.
I love it, but has no label in the ground, and is on my planting plan spreadsheet as "Camano Pet." This would typically mean it was shoved in the hole when my original plant failed. However I don't even have a record of buying another pink fimbriated dahlia.