1) Character 2) Fictional character 3) Fictitious character 4) In days of knights 
• (a.) Of or pertaining to King Arthur or his knights.
Ar·thu'ri·an adjective Of or pertaining to King Arthur or his knights. J. R. Symonds. « In magnitude, in interest, and as a literary origin, the Arthurian invention dwarfs all other things in the book.» Saintsbury. 
[adj] - of or relating to King Arthur and the Knights of the Round Table
adjective of or relating to King Arthur and the Knights of the Round Table
of or pertaining to King Arthur, who, with his knights, formed the subject of a large part of medieval romance: Arthurian legends.