Yannick is a Reaper leader of sorts, and he dispatches Reapers, sending them on assignments to hunt down and kill Grimms. He was sent the two heads of Junkers and Reaper in an ice box after sending them to Portland to kill Nick.
Junkers was sent by Yannick, along with Reaper, to behead Nick. In a fight that ensued with Nick, Junkers was accidentally beheaded by Reaper with a scythe when Nick ducked Reaper's attack.
She worked in the Grosszahn Construction building as Robert Grosszahn's secretary. When Nick and Hank interrogated her, she said that she had no knowledge of his 9 o'clock appointment or what the initials S.B. stood for. She did say that Robert had been arguing with Mr. Butrell and the planning company, which led to Nick and Hank following up on that lead.