In the One and only Ivan, there is a grilla named Ivan. All the people in the mall thinks he is a calm, cute and smart grilla. But actually, Ivan gets mad and angry and fustrayted in one of the moments in the story. I found this quite unexpected, I myself, when reading this part of the book, is awstuck by this temper Ivan was having.
Extract
I bounce off the walls. I screech and bellow. I beat and beat and beat my chest. Bob hides under Not-Tag, his paws over his ears. I’m angry, at last. I have some one to protect.