From Grimm wiki

Juliette Silverton

Juliette Silverton is a veterinarian who becomes deeply entangled in the supernatural world of Portland after her partner, Nick Burkhardt, discovers his heritage as a Grimm.

Initially introduced as the stable and supportive girlfriend of Nick Burkhardt, Juliette Silverton leads a quiet life as a veterinarian before her world is upended by the existence of Wesen. Her proximity to the Grimm lifestyle leads to significant trauma, including memory loss and a forced transformation into a Hexenbiest after consuming a potion intended to restore her lost memories of Nick. This transition fundamentally alters her personality and allegiances, pushing her away from her former life and towards a more volatile existence.

Transformation and Legacy

Following her transformation, Juliette becomes a formidable adversary, eventually adopting the identity of Eve as an operative for Hadrian's Wall. Her journey is marked by intense conflict with Adalind Schade and Captain Sean Renard, as she struggles to reconcile her human past with her new supernatural capabilities. Her evolution from a civilian bystander to a powerful, albeit dangerous, ally remains a pivotal element of the series, testing the boundaries of her relationship with Nick and her humanity.