Henry, or as we like to call him, Horrid Henry, is the main character of everything Horrid Henry related. He is rude, selfish and angry, especially when it comes to his younger brother's, NICE behaviour.
Peter is a very good boy, he is never naughty for his parents, he can be mischievous at times, but most of the time, he's the complete opposite of Henry! Peter has a good role model, just to note, a very good boy, with an out of control brother!
As her nickname mentions, she is a grumpy old grouch, she is always arguing with her friends! She hates Henry, her catchphrase for when Henry gets her mad is "I'll get you Henry!"
Henry and Peter's mother, when she shouts, in her head, she says that she feels like she's been through hell.