jujubiest and myself had this discussion a while back, and I think we came to the conclusion that the timelines just don’t match up for Trubel to be Nick’s younger sister, and since there is at least ten years between them, they can’t be twins.
However, we do love their brother/sister relationship, and look forward to it continuing!
Hey there! Admin Liz here, putting in her two cents.
I LOVE Trubel and her relationship with Nick – they definitely have a sibling/mentor thing going on and I feel like Trubel really needed someone she could rely on (even though Nick can be a bit… unpredictable?).
As far as them being actual siblings go, there are a lot of fan theories out there talking about Trubel’s background. I’m assuming Nick is in his 30s and Trubel is in her 20s, so in all honesty while they could be siblings, I agree that it’s highly unlikely, though I don’t think it’s completely farfetched that they are somehow related. I’d assume that there is some sort of familial bloodline that runs through all Grimms, since the powers can’t possibly be that random.
We have yet to learn exactly how Grimm powers work. Obviously they run in families, but both parents don’t have to be Grimms to have a child with the powers (as demonstrated by Nick’s parents). Hopefully in the coming seasons they’ll explore this more. Personally, I was hoping they would go into this a bit when Nick lost his powers, but I think that is something we would have to learn about from someone who has been raised in a proper Grimm household, unlike Nick and Trubel who learned about their family legacy later in life, when there was no one there to really explain it. I’d be interested to find out if it’s sort of like a Rowling Wizarding World thing where there are pure blood, half blood, and muggle born (for lack of a better term) Grimms.
With the show going into its fifth season, hopefully we’ll start getting some more information on the actual mythology of the world they’re building, as well as some further background information on our beloved Trubel!















