Serena is a whiny, insecure, clumsy, ditzy pig.  She whines about school and many other things.  She is insecure about Darien.  She gets worried and jealous when she sees Darien with another girl, although she and Mina followed around Amara when they thought she was male because she (or 'he') was cute.  Does she not already have a boyfriend?  She clumsy, always tripping and falling, and while she might at first appear graceful to her enemies, it doesn't last. Wham!  She is attacked and losses all her poise.  In addition, Serena is a bit of ditz.  Especially when it comes to schoolwork.  She also eats like a pig.  I am sure many of us are jealous because she eats so much and yet maintains a perfect figure.
   Okay, so that was the first impression usually gotten from her.  Now that I have bashed on Serena's not so appealing side, I will now comment on her good side.  There is much more to Serena than her being a whiny, insecure, clumsy, ditzy pig.  She may whine, but she gives everything her best shot.  So what if her strong point is not school?  At times, she may be insecure about Darien, but she really loves him.  She risked her live to save his so many times I can not begin to name them all.  So she clumsy.  So what?  Who can truthfully admit they do not trip over the telephone cord every once in awhile?  Okay, she can be ditzy.  She is a blonde.  However, she is sincere.  She will do anything to help her friends.  Who would not want a friend like that?  She also may be a pig when it comes to food.  Food is so good sometimes, though.  Serena just appreciates food, and has an amazingly high metabolism.  Serena is an all around good person if you just look beyond her not-so-appealing shell.