One good 'Percy and Annabeth Tartarus fanfic' is 'Into the Depths'. It really captures the struggle and bond between Percy and Annabeth in Tartarus. The author does a great job of describing the terrifying environment.
There's also 'Surviving Tartarus'. In this fanfic, Percy and Annabeth face numerous challenges in Tartarus. It shows how their love for each other helps them get through the most difficult situations. The detailed descriptions of their battles against the monsters are quite engaging.
One popular type of fanfic could be about Percy and Annabeth's journey through Tartarus. It might focus on their struggles, like how they face the various terrifying monsters there. Maybe they use their unique powers and the bond between them to survive. For example, Percy's control over water could be crucial in crossing some of the dangerous rivers in Tartarus, while Annabeth's wisdom helps them make smart decisions when choosing paths in that dark and chaotic place.
One interesting plotline could be their struggle against the various monsters in Tartarus. For example, facing off against the giants or other terrifying creatures that lurk there. Another could be their search for a way out while dealing with the psychological toll of being in such a dark and desolate place.
Percy might develop more of a steely determination. In Tartarus, he has to face extreme danger, which could make him even more resolute in protecting Annabeth and getting out. Annabeth, on the other hand, could become more resourceful. She'd have to use her wits in this strange and deadly place.
They are popular because Percy and Annabeth are beloved characters. Their journey in Tartarus is full of action and adventure, which makes for exciting fanfic material.
In this fanfic, they might face terrifying monsters. Tartarus is full of dangerous creatures, so they could be constantly fighting for their lives, like battling against ancient Titans or monstrous beasts that are native to that hellish place.
In this fanfic, Percy could develop a darker side. The horrors of Tartarus might make him more ruthless when it comes to protecting himself and Annabeth. Annabeth, on the other hand, may become more empathetic. She could see the pain and suffering of the other beings trapped in Tartarus and try to help them, which would shape her character in a new way. Also, their relationship would develop further. They would have to trust each other completely, and this could lead to a more mature and deep connection between them.
One possible storyline could be them dealing with PTSD. Percy might have nightmares about the horrors in Tartarus, and Annabeth could struggle with sudden bouts of anxiety in seemingly safe situations. They would have to support each other through these tough times, learning to communicate better about their feelings.
One interesting scenario could be Percy and Annabeth finding a hidden, powerful weapon in Tartarus that gives them an edge against the monsters there. Maybe it's a sword that can cut through the very fabric of Tartarus's darkness.
One more plot idea could be that Percy and Annabeth are somehow affected by the dark magic of Tartarus. It changes them in some way, either physically or mentally. They then have to deal with these changes while still trying to escape. This could lead to some really intense internal and external conflicts as they struggle to stay true to themselves and also find a way out of Tartarus.
One great 'percy tartarus fanfic' could be 'Percy in Tartarus: The Unseen Trials'. It really delves into Percy's mental and physical struggles in Tartarus. Another one is 'Tartarus: Percy's Redemption' which focuses on his journey to redeem himself within the harsh environment of Tartarus. There's also 'Percy and the Tartarus Nightmares' that has some really interesting takes on the nightmares he faces there.