Who is Sir Terry Pratchett's "wizzard"? (intentional misspelling)

Rincewind

Rincewind was the first protagonist of Discworld; a wizard with no skill, no wizardly qualifications, and no interest in heroics. He is the archetypal coward but is constantly thrust into extremely dangerous adventures. In The Last Hero, he flatly states that he does not wish to join an expedition to explore over the edge of the Disc—but, being fully geared for the expedition at the time, clarifies by saying that any amount of protesting on his part is futile, as something will eventually occur that will bring him into the expedition anyway. As such, he not only constantly succeeds in staying alive, but also saves Discworld on several occasions, and has an instrumental role in the emergence of life on Roundworld (Science of Discworld).