Cedric Diggory's father and the head of the Department for the Control and Regulation of Magical Creatures. He's proud of Cedric and expresses it in a way that embarrasses Cedric; the few times that Harry meets Mr. Diggory, he speaks as though he's obsessed with pointing out the ways in which Cedric is better and Harry is inferior. He also shows that he's willing to jump to conclusions, as when he accuses the house-elf Winky of conjuring the Dark Mark, thereby accusing Mr. Crouch of teaching her to do so. The way he speaks to Winky (he calls her "elf" and uses a stern voice) suggests that he doesn't think highly of the creatures that answer to his department.
Amos Diggory Character Timeline in Harry Potter and the Goblet of Fire
The timeline below shows where the character Amos Diggory appears in Harry Potter and the Goblet of Fire. The colored dots and icons indicate which themes are associated with that appearance.
...yells to Mr. Weasley that he has it; it's an old boot. Mr. Weasley introduces Amos Diggory and his son, Cedric, a sixth-year Hufflepuff and Quidditch player at Hogwarts. Mr. Diggory notices... (full context)
...and when Hermione points towards where the conjuror stood, several others investigate the dark woods. Mr. Diggory emerges from the trees with Winky unconscious in his arms. Mr. Crouch investigates where she... (full context)
...Harry enters the kitchen to see Mr. Weasley taking an urgent message from the Ministry. Mr. Diggory 's head is sitting in the fire, talking about someone named Mad-Eye, "please-men," and rogue... (full context)