There are fanfictions where Loki survives Endgame by traveling through different timelines. In these stories, he might encounter alternate versions of the Avengers and himself. For example, he could meet a younger version of Thor from a timeline where he never got banished. This would lead to a whole new set of adventures and interactions that change the course of the events in Endgame.
In fanfiction, Loki's survival can be justified through his magic. He is a master of illusions and trickery. So, he could have used a very advanced illusion to make it seem like he was killed when in fact he wasn't. He could have been biding his time, waiting for the right moment to re - enter the fray and help the Avengers against Thanos.
In some fanfictions, Captain America's death in 'Avengers Endgame' could be a very emotional moment. Writers might explore how the other Avengers react to his loss. For example, Iron Man could feel a deep sense of guilt for not being able to prevent it, even though he himself might have sacrificed before. The remaining Avengers would have to pick up the pieces and continue the fight without their iconic leader. His death could also lead to new character developments among the younger heroes who looked up to him.
A female Master of Death in such a fanfiction might have a complex backstory. She could have been an ordinary girl in one of the universes, but through some extraordinary events, she gains the title of Master of Death. In relation to Harry, she could help him understand the true nature of death and its implications in a way that Dumbledore couldn't. With Loki, she might be both an ally and a source of mystery, as Loki tries to figure out how to use her powers for his own ends.
Thor might initially go into denial. He can't believe that Loki is truly gone. He may hold Loki's body for a long time, as if waiting for him to come back to life. Then, he could become angry. Angry at the situation, at whoever or whatever caused Loki's death. Eventually, he may find solace in the memories of Loki. Remembering the good times they had together and using those memories to move forward.
One popular 'Avengers watch Loki death' fanfiction might be 'The Aftermath' which delves into the Avengers' complex emotions as they witness Loki's death. It shows how each character reacts differently, with Thor being grief - stricken and Captain America feeling a sense of loss for a fallen enemy. Another could be 'A New Perspective' where the event is re - examined through the eyes of a new character who has joined the Avengers. This fanfiction gives insights into how the team dynamics change after such a significant event.
One key theme is the exploration of the concept of death. Since Fem Death is involved, the fanfictions often look at how death is perceived in different mythologies and how Loki's relationship with it changes his view. For example, he might start to see death not just as an end but as a new beginning.
She can be portrayed as a powerful and mysterious figure. Maybe she has the ability to travel between the magical world of Harry Potter and the realm of Loki with ease. Her appearance could be both alluring and intimidating, with a presence that commands respect.