Thor Ragnarok: Who Is Valkyrie?

The final Marvel movie of the year, Thor: Ragnarok, comes to a theater near you within a matter of days. The latest installment in the Thor franchise features numerous other heroes from the Marvel Comics including newcomer Valkyrie. Who is this character and where did she come from? We're taking a look at this character's origins and summing up everything you need to know.While the character is loosely based on Norse mythology, she made her first appearance in Defenders #4 back in 1973. The Marv