Ravenclaw or Slytherin.Originally Posted by solemnlyswear_x
Ravenclaw for the reasons everyone else stated: Because she figured out the egg clue, and thought Cedric was an idiot for not doing so himself. However, I'm sure that other houses could figure something like that out, so this may not have helped much. There's a bit of a chance that she was a Slytherin for these Slytheriny lines...
"Anyway, what really got me was that it was a boy speaking. So I unlocked the door, to tell hime to use his own toilet, and then-"
"And then I came back agian, I was determained to haunt Olive Hornby, you see."
Another factor that points to Slytherin: She was a muggleborn. Everyone made fun of her. These may be unrelated, and possibly everyone made fun of her for her glasses and the fact that she's a crybaby, but still. The most well known Slytherins are pureblood activists. Olive Hornby could be a Slytherin, too.