I actually looked into that back in the Mansion days, and I’m not quite sure, but it looks like she has a single binding here in the carbon ring, where a thhird double binding should be.
p.s. I have on occasion investigated tattoos, it bothered me to no end when I couldn’t make sense of the tatoo on my darling Kira’s arm, turned out it was a surrealist elephant by Dalí.
