I guess if I was in the house and i was voting for someone who'd been nominated 5 weeks straight and survived i'd see it as a wasted vote....Noirin has had quite a few arguements, she's led markus on, had a good rant at siavash, during which she told freddie where to go, charlie and carly are upset about the rabbit thing (did they say it??!!), Lisa used to be fairly close to Noiron but there seems to be a bit of a battle there for the dominant female of the house...both strong characters and Lisa had a fair point when she was in the diary room talking about how she's led Markus on, having previously had markus talking to her and charlie believing something could happen with noirin on the outside.
Once again Marcus is a strong character, seems to have an air of the 'know it all' about him, spends far too much time talking about 'the others' and their 'game plan' whilst in turn he's talking about people and trying to make an impression on others with a view to turning them towards his way of thinking....
All in my humble opinion of course