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My take on an age/role swap AU! text on the image from left to right: Group Senior Five Pebbles The back arm doesn't interfere with how the capelet sits, as iterators tend to keep the first segment of their back arm somewhat parallel to their spine. This is actually consistent to their in game behaviour!
Back of the robe hidden by the capelet the cut from the back arm hole to the top has hooks which can be undone to allow the robe to be taken on and off. The rope around his sash is flatly braided. This allows it to be comfortably crossed and helps stop it from slipping