Here are some starter points:
Shrek is self-loathing at times and feels that he does not really fit in. He also has a tough exterior, but he is a big teddy bear inside.
Fiona feels trapped by her status. Inside she is a free person with passion and want to be a little crazy, quite frankly.
Lord Farquaad is an arrogant superficial jerk. He is filled with his own self-importance and everyone loves to hate him. He is the opposite of Shrek.
Donkey is comic relief in the best sense. He is also sweet.
I think your teacher is asking you to write a compare/contrast type of essay.
Begin by asking yourself some questions:
- How are these characters alike? (Make a list for each character)
- How are they different? (Make a list for each character)
First of all, they are all imaginary or not real. Each of these creatures alludes to a fairy-tale story.
As you write your essay, you will want to include examples and descriptions from the movie of how each of these characters exemplify the character traits you list.