Juliette (Bitsie Tulloch) from "Grimm" has been a somewhat subdued character until the finale. In the finale, the Hexenbiest Adalind (Claire Coffee) infected Juliette with some sort of potion that turned her eyes black, giving the impression that she may now be some sort of creature. Here are the reasons why that may be a good thing. In fact, it may be very cool.
It will give Juliette something to do.
Juliette never really had much to do in Season 1, besides being labeled Nick's girlfriend. There were some hints that she may be more than she initially seemed when she helped Nick with a few cases, but she never did much more than simply help. At first, it seemed as though she could be some sort of "Grimm companion." Now that she may be some sort of dark creature, she may be working against Nick, which will still give her an important role in the show.
It could give Nick some emotional pain.
Nick (David Giuntoli) never seems bothered by anything much. He has never been truly angry, afraid, or sad throughout Season 1. Perhaps now that the love of his life may be working against him (or at the least be in grave danger), it will give him some truly sad or frightening moments.
Nick can't rely on Monroe for everything.
Nick may be able to use Monroe's (Silas Weir Mitchell) help with Juliette in some respects, but hopefully any help Monroe can offer will not be a quick fix. If Juliette's condition lasts, Nick will have a problem that affects him in a very personal way as the man who almost married Juliette. He will have to figure out how to deal with the emotional aspect of it on his own.
It could make Juliette more interesting.
Assuming there is no quick fix for Juliette's condition, she may become a much more interesting character on the show. Hopefully, if she is a creature, she will be an unusual being with strange abilities. As a weird creature, she could add an entertaining aspect to the show.
The show can reinvent itself and stay fresh.
If Juliette remains as a creature, it will be like removing one character and adding a new one. Hopefully, a new version of Juliette will be much more exciting than the old one. If the new Juliette is somewhat evil, then fighting (as well as saving) her could be a major focus of the show, reinventing the basis from the creature-of-the-week premise.
Image source: GRIMM -- "Leave it to Beavers" Episode 119 -- Pictured: Bitsie Tulloch as Juliette Silverton -- (Photo by: Scott Green/NBC), Airdate: Friday, April 27 on NBC (9-10 ET), © NBC Universal, Inc.