From her temple to the top of her jaw. It would be a tree branch with small leaves coming from it. Then, just for Ridahne, for the Guardian mark, a small ampple hanging from the bottom. Darin would love for the Guardian mark to be green too, but since Ridahne practically had a heart the last time Darin suggested a new color she won't bring it up again. 

I figure the number of leaves could indicate if one was Seed-Chained, Seed-Friend, or Seed-Cursed.

What do you think?