Simon is the husband of Mum, the older brother of Fussy Francis and the father of Horrid Henry and Perfect Peter. He doesn't seem to trust Henry in terms of behaviour at all. Almost every single day, he yells "Go to your room now, Henry!", as well as punishing him. If Henry's not well-behaved. He is not as strict as Mum, and doesn't punish Henry as much as she does.
In Series 4, he treats Henry a lot better.
Dad appears to be wearing a blue jacket, with an orange sweater underneath. He also wears dark brown pants, with even darker brown shoes. He has short, curly light brown hair, and pale skin.
- In Horrid Henry's Daring Deed, Peter calls him Daring Dad for scaring off a spider.
- In Horrid Henry's Animal Antics, he gives up.
- In Who Stole Mr Kill, Henry calls him Dodgy Dad while looking at a picture of him playing tennis.
- In Horrid Henry and the Silly Siblings it’s revealed that Dad’s first name is Simon and his childhood nickname was Silly Simon.