Juliette Silverton is Nick Burkhardts girlfriend, not knowing about the Wesen world, and not knowing Nick is a Grimm. however, in the below, she gets a taste of it.
This episode, she is treating a supposedly sick cat owned, by Adalind. She is scratched, by a cat, who's eyes turn black and tounge turns yellow. Nick tries to tell her about being a Grimm, and when Monroe morphs for her to see, she faints and goes to the hospital. The last we see of her this season, is when she is twiching, and opens her eyes, with her eyes black hinting she is turning into a wesen.