Selina had me at the first minute and a half of first episode. I just love how she moves, the look of glee she has before leaping form the roof, and then stealing to feed a stray cat.

My Rollo is the one from season 3a, when he gives Bjorn better advice about how to treat Porunn than Ragnar does. I also loved when he and Lagertha grumpily poured out the wine cups when it was revealed the wine was likely poisoned. I'm failing at finding a clip.