Cassandra rolled her eyes. Marco and Dia were being a childish... great.

"I do not like the classification of dark professor, I think it is the way a creature is brought up. You can find the tamest, more sweetest occamy, but there are chihuahuas that will chew your ankles to threads.

The way I would distinguish the creatures is looking in their eyes. They are the window to their soul and I believe you can tell if the creature is dark that way..."

Then Cassandra rolled her eyes and added "If you were looking at Ministry classification, then any creature who isn't small, soft and cuddly, then they are dark."