Helen was the violin first chair of Vanya's orchestra who hadn't been unseated for five years. Her prodigious skill with the violin drew the admiration of Vanya Hargreeves, who struggled to match her level of skill and natural ability. She is shown to be cold and dismissive towards Vanya, who she believes doesn't possess any special ability or passion for the violin.
She was ultimately murdered by Leonard Peabody so that Vanya could get the first chair position. She is dead by the episode Number Five, in which Vanya comments that Helen had failed to show up for past rehearsals. At the end of the episode, Helen's body is shown wrapped in a plastic tarp in Leonard's attic.