Diana (Hannah R. Loyd) is going to be one big threat in the Nick (David Giuntoli) and Adalind (Claire Coffee) love story in the upcoming season of "Grimm."

During the last installment's finale, the little girl demonstrated how fearsome she really was. At her young age, she has already mastered her powers. She also showed a fanatic belief that her parents, Adalind and Renard (Sasha Roiz), must end up together. Anyone who stood in her way was eliminated. Even Bonaparte (Shaun Toub) tasted her wrath when he inadvertently hurt Adalind. Diana thought he should die for causing her mother pain. She did it without even touching him. Nick and Renard, who witnessed the entire thing, were left speechless by her power.

In the new season, it is expected that the fight between the two men will continue. Nick wants Adalind and his son back. He will do everything to make Renard pay for his crimes and get back what is his. Unfortunately for Nick, he will also have to contend with Diana, who will make sure he will not succeed. For Diana, her family is the most important thing in her world and she is determined to have it stay that way. This makes Nick a big threat and if she must eliminate him as well, so be it.

Meanwhile, Giuntoli talked to Entertainment Weekly about what is in store for his character in season 6. He hinted that there would be less storylines about Black Claw since the installment focuses on other "evil" groups. The actor also talked about the character couple expecting their first child, Rosalee (Bree Turner) and Monroe (Silas Weir Mitchell). He said it would be a joy seeing the two forgetting about their differences for their baby's sake.

"We've built such rich histories for all of our characters now. I kind of hope we have some time to steep in our main characters and focus a little less on Black Claw and stuff like the exterior, evil groups. Let Juliette come back and watch the fallout of that. The writers brilliantly set up this scenario where Nick's now happily with Adalind and they have a kid," he shared.