After Tony's death, Loki will take the arc reactor form his chest and keep it with him utill the day it finally stops working. He won't cry when he sees its light has died. Instead, he will pick it up and carry it into battle as he begins Ragnarök; Never letting the dead reactor go until the moment he is slain in battle.

It is a surprise for Tony when Loki appears at his house two years after the battle. Slowly he pieces together what happened to the Asgardian that made him so jaded. Tony/Loki eventually.