Shileen is Sarena's short-tempered younger sister, but you could never tell due to their differences.  She isn't a fan of school, and doesn't like authority.  She's also more aggressive than her older sibling, and is somewhat of a loosecannon.  One of the only similarities between the two is that they both have blackbelts in Karate, which Shileen is very passionate about.  While Sarena tries to keep her karate talents a secret, Shileen has no problems with flaunting it. Unfortunately the law prevents her from using it on whoever she pleases, so she lets out her frustration by playing violent video games. Shileen is in the same class as Davey and Craigers, so it's no surprise that she doesn't have much patience left.  When one first meets Shileen, she can seem to have an icy exterior that can be a little intimidating, however once you break through you'll find she's one of the most loyal friends a person can have.  Shileen will go to no end to defend a friend in trouble, so having her in your corner is definitely one of the best moves you can make.