Where did the fictional character portrayed in Ragnarok film first appreared?
Thor: Ragnarok: Thor: Ragnarok is an upcoming American superhero film based on the Marvel Comics character Thor, produced by Marvel Studios and distributed by Walt Disney Studios Motion Pictures. Hela (comics):  Debuting in the Silver Age of comic books, Hela first appeared in "Journey into Mystery" #102 and was adapted from Norse mythology by Stan Lee and Jack Kirby.
Journey into Mystery