Lagertha is one of the main protagonists of History Channel’s hit TV series “Vikings”. The beautiful blonde female warrior is played by sexy Canadian actress Katheryn Winnick, who has managed to convey the fierce character of the “shieldmaiden”, as she is known in the series, while retaining the feminine aspects of the Norse warrior. The 39-year-old actress has a great love of martial arts and is very skilled at it, as a video she shared with her instagram followers testifies.