Final answer:
The character referred to as a "real wart" and the daughter of Mr. Harry Wormwood in the provided excerpt is Matilda Wormwood from Roald Dahl's novel 'Matilda'.
Step-by-step explanation:
In the provided excerpt, the daughter of Mr. Harry Wormwood who is referred to as a "real wart" is Matilda Wormwood. This character comes from the novel 'Matilda' written by Roald Dahl. Matilda is an exceptionally intelligent girl who faces various challenges, primarily due to her family’s disregard for her love of reading and learning. Despite her intelligence and kindness, Matilda is unappreciated by her parents, particularly her father, Harry Wormwood, who often expresses his disdain for her. This is exemplified in the line spoken by Harry Wormwood, indicating the low regard he holds for his daughter.