Intelligent and extremely ambitious, she thrives for perfectionism in everything she does, in an attempt to live up to the high expectations of her parents.
Spencer's biggest rival is her older sister, Melissa, and the two are constantly at odds.
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Aria Montgomery (Lucy Hale) the group's "artsy girl", who returns to Rosewood with her family after spending a year in Iceland.
They girls believe that she's 'A', and she's arrested.
Later in season 5, the girls finds out that she isn't 'A', but her trial is about to start. In the season 5 finale, she reveals to Peter and Veronica Hastings that 'A' was the one who kidnapped the girls.
In season 6, she deals with her time in the dollhouse and Charlotte.