Time and Time Again {Loki X Reader Fanfic}

You were just a normal person, having your entire life ahead of you, especially due to the fact that you were immortal. You hated this aspect of your life as you had to watch everyone you grew close to die eventually. After about 90 years you had seen the world fall and rise back up a few times, each time you only let it effect you slightly. You knew one day you would watch the world fall around you and all you could do was sigh and move on. You weren't fond of the other realms, finding Midgard the only place where you felt safe and slightly stable. You did have contact with S.H.I.E.L.D but they only ever called you in on very rare occasions. You watched the Avengers assemble and to be frank, you didn't care for the team of heroes, finding them useless if all they did was destroy hard work and hardly catch the bad guy. But what happens when you experience the attack on New York and are called in to assist S.H.I.E.L.D? Will you find something they didn't in examining their prisoner? Or will the prisoner find something they didn't in you?