History
Aragorn is the winged horse ridden by Valkyrie, formerly owned by Dane Whitman, the heroic Black Knight.
Aragorn was created by Whitman when he used the genetic techniques of his uncle, Nathan Garrett, the villainous Black Knight, to turn a normal horse into a flying steed. When Dane left his own time for a temporary stay in the Twelfth Century A.D., he entrusted Aragorn to the care of Brunnhilde, the Valkyrie.
He aided Valkyrie numerous times during her battles along S.H.I.E.L.D.'s alliance against supervillains who tried to acquire the valued Isotope-8.[1]