We see her true character begin to manifest. The spiteful, mean 'office queen' that's hell bent on taking down anyone in her path - with that ever so cutesy face. Evidence:
1) Destroyed Pams painting
2) Wouldn't put Pams snacks on the reception desk w/o permission
3) Walked out on the best scene last season with Andy and Dwight performing their music... foreshadowed her deceptive ways
4) She is really a redhead. At least Meredith wears her imperfections on her sleeve.
5) Everyone on the staff can't stand her except Kelly and Michael. I know my comments will be unpopular here, but just wait. She is a supervillan in the making. She is probably this way in real life too.