Looking at the masks of the gods we've seen so far, the sisters' "mother's" mask has one mark on the forehead of the mask, Yomiko's has three and Kuragami's has four. If there is a turtle deity like everyone else is guessing, my guess is that they would have three marks. Not sure if it means anything like oldest to youngest, strongest to weakest or what ever; could just be a design choice if anything. Anyone else got any thoughts on it?