Reiner did die in the manga. His death was a result of a series of events and conflicts that had been building up throughout the storyline. It had a major impact on the plot and the other characters.
Well, one possibility could be that Naruto is in a really tough battle, perhaps against a group of powerful enemies. Anko could show up just in time. She might use her snake-based jutsu to fend off the attackers. For example, she could summon snakes to entangle the enemies, giving Naruto a chance to catch his breath and regain his strength.
Love and sacrifice are common themes. Often, Reiner has to sacrifice something for the sake of love in these fanfictions. It could be his position in the Legends world or his own safety.
One great fanfiction is 'The Trio's Bond'. It delves deep into the complex relationships between Reiner, Bertholdt, and Annie. It shows how their shared experiences in the military and their secrets bind them together in ways that are both heart - warming and full of tension. Another one to check out is 'Among the Three'. This fic focuses on their individual growth while also exploring their interactions with each other, giving a fresh perspective on their characters.
Well, it could be that the boy's presence and need for help give the man a reason to fight his suicidal thoughts. Maybe the act of saving the boy brings the man back to a sense of responsibility and connection with the world.
The theme of trust is crucial in 'Attack on Titan Reiner x Bertholdt fanfiction'. They have to trust each other completely in order to survive in the harsh world of Titans. Additionally, the theme of redemption sometimes shows up. If they make mistakes or have actions that they regret, they try to redeem themselves in the eyes of each other and also within the context of their friendship.