They could be from a fight with a powerful magical being. Maybe Loki tried to steal a powerful artifact from a wizard or a sorcerer, and in the process, he got injured and the scars remained.
Thor could also become very angry. Not at Loki, but at whatever or whoever caused those scars. He might vow to avenge Loki and seek out those responsible. For example, if the scars were from a battle with a particular enemy, Thor would be determined to confront that foe.
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.
The husband should first have an honest conversation with his wife to understand the situation fully. Then, he should confront his best friend and clearly state that this behavior is unacceptable and has violated their privacy and the boundaries of their relationship.
In such fanfictions, the relationship between Naruto and Kyuubi can be developed in various ways. For example, the Kyuubi could start teaching Naruto about his heritage in a more motherly way, like sharing stories of the Uzumaki clan. Naruto, on the other hand, could show his loyalty and love towards the Kyuubi as he would to a mother. This could also impact his relationships with other characters. His friends might be initially confused but later come to understand and support this new relationship of Naruto's.
It could be a complex relationship. Loki, being his mother, might be both nurturing and mischievous towards Merlin. She could teach him all kinds of magic, both the useful and the tricky ones. Merlin would probably have a deep respect for her, but also be a bit wary of her tricks.