William of Normandy was obviously a French conqueror, so his own people tended to see him more favorably than the English. He came to England, killed its ruler, and took the throne for himself (thus becoming William I), so the English may have seen him as a usurper and a tyrant, whereas the French saw him as a victorious hero. This all happened in 1066, at the Battle of Hastings.
When the author uses irony in his work, he assumes that the readers and the audience know how he truly feels or what he really wants to convey. Really to emphasize a point.
I would say Self centered but if not maybe curious . I do not know much about the text