– the Thor comics, Eitri is the leader of the Dwarves of Nidavellir, one of the Nine Realms that the Asgardians rule over.
Eitri’s personal relationship with Asgard began several centuries ago, when Odin intervened in Nidavellir to prevent the Rock Trolls from occupying and subjugating the land.
Eitri here serves more as a reference than as an actual character, but it nonetheless establishes the mythological figure in the cinematic pantheon.
Should the Dwarf appear in both parts of the new Avengers, it would naturally entail that he has a much larger role to play in the joint story.