We saw Oona Chaplin who plays Talisa only in a few episodes and most of the time she looked really dirty. Despite her "dirty" character she looks pretty nice when she's not amputating legs and doesn't have blood all over her shirt.
Her character is a very gentle shy one and Robb Stark falls in love with her even though she's a "commoner." There was an obvious connection between her and Robb Stark from her first appearance when she amputated someone's leg. Finally, her character, has sex with Robb Stark.
Here she is cleaned up in The Game of Thrones:
In episode 8 she gets full on naked but they don't show everything. She only shows some booty.