<Li> Stephen McHattie as Vaun, leader of a band of undead hunters sent to destroy the vampire outbreak . (seasons 1--2) </Li> <Li> Melanie Merkosky as Sylvia Kent, Jim Kent's cancer - stricken wife . (season 1) </Li> <Li> Rhona Mitra as Charlotte, a woman who joins Fet and Quinlan in their search for weapons to destroy the Master . (season 4) </Li> <Li> Drew Nelson as Matt Sayles, Kelly Goodweather's live - in boyfriend . (season 1) </Li>

Who plays charlotte in the strain season 4