The Question and Answer section for The Castle of Otranto is a great resource to ask questions, find answers, and discuss the novel.
As a Gothic text, The Castle of Otranto provides various tropes through which terror and disgust are expounded upon. The characterization of Manfred in particular is intriguing in that he is portrayed not only as the novel's antagonist, but also...
You can check out the themes below:
https://www.gradesaver.com/the-castle-of-otranto/study-guide/themes
Manfred is perhaps best classified as the protagonist, as he is the central character—even though he's also an antagonist villain.
