Grimm

Portland police Nick Burkhardt believed himself a normal human being, raised by his aunt after his parents died in a car crash in New York. But he soon discovered that he had the ability to see monsters, the Wesen, as they really were below their human disguised. After his Aunt Marie died, Nick discovered his heritage: he is the descendent of the Grimms: monster-hunters who killed of any Wesen that poses a threat to humanity. Now Nick divides his time between investigating human killers and policing the Wesen community in Portland while helping those who need help.

Hank Griffin is Nick's partner in the Portland PD. During the first season he was unaware that Nick was actually a Grimm, but suffered a series of near-encounters with Wesen killers. Hank finally caught a glimpse of Monroe in his Blutbad form. The sight drove him to the edge of insanity and Nick finally told him about the shadow world that he inhibits. Now Hank struggles to accept the Wesen and help his partner, but has realized that not even the Grimms are a complete force for good.

Juliette is Nick's fiancee of several years, and is a veterinarian in Portland. She is slowly exposed to the Wesen in the first season but refuses to accept it when Nick tells her the truth about his lineage as a Grimm. Before they can resolve members, Juliette is the target of a Hexenbiest seeking revenge on Nick by striking at his loved ones and goes into a coma.

Captain Renard is eventually required to drink a potion and bring Juliette out of her coma. She loses all memory of Nick and soon discovers that she has strong mystically-compelled feelings for Renard, the man who saved her life. While she tries to deal with those feelings, she tries to get in touch with the emotions that drew her to Nick in the first place.

Sean Renard is the half-breed son of one of the Seven Families of Europe, who have ruled over the continent and the Wesen for generations. His mother was a Hexenbiest who was the mistress to a Royal, and Sean was the offspring. She fled with him to Portland when the scandal was revealed and has since developed a power base in America. He has since become a captain in the Portland PD and is aware that Nick Berkhardt is a Grimm, although Nick does not know who his boss really is. Now, Renard tries to engineer his return to power while keeping an eye on Nick and using him to his own advantage without revealing his true nature.