Okay, hear me out. I found this picture of a lady we've never seen before, on Eli's theory board, in the trilogy teaser where Eli and Toby talk about aliens being existent.
Morgana has green eyes and the lady seems to (might, although it's blurry) have green eyes as well. We also have never seen the color of Morgana's hair, and maybe she has the same hair colour as that lady?
BUT, notice that Eli drew a circle with a question mark pointing to her LEFT hand. there's a small dark object that may be the object that he's referring to, but it may also mean something when he circled the same (left) hand that Merlin took from Morgana.