He gives her a big hug. Physical contact can be very comforting, and Percy's hugs are always warm and reassuring.
Percy might share a funny story. For example, he could tell her about the time Grover got his hooves stuck in a marshmallow trap. This would make Annabeth laugh and forget her troubles for a while.
Percy would listen to her. He'd let her pour out all her feelings without interruption. Then he'd tell her how strong and amazing she is, and that whatever is making her cry will pass. He might say things like 'You've faced so many challenges before, this is just another one we'll overcome together.'
It could be that she's homesick. Despite all the adventures, sometimes the longing for home can be overwhelming. Percy would comfort her by sharing his own feelings of missing his mother and how they can make new homes with their friends. He might hold her hand and tell her that their friends are like family now.
The popularity also comes from the fact that both characters are very well - loved. Percy is brave and kind, and Annabeth is intelligent and strong. Seeing Percy be there for Annabeth gives fans a sense of warmth. For example, in the original books, they've been through so much together, and fanfiction allows fans to explore more of those tender moments of comfort. It gives a chance to delve deeper into their relationship, beyond what was shown in the main series.
Yes, there are quite a few. You can start by looking on fanfic websites like Archive of Our Own. Some fanfics might focus on Percy being there for Annabeth during her tough times in Camp Half - Blood, like when she's stressed about a quest or having problems with other campers.
One great Percy Comforts Annabeth fanfiction could be 'A Shoulder to Lean On'. In this story, Percy finds Annabeth after she has a nightmare about Tartarus. He holds her close and tells her that they are safe now, and he won't let anything bad happen to her again. His kind words and warm embrace slowly ease her fears.
Well, perhaps it could be about a great battle where Percy sacrifices himself to save his friends or the world. Annabeth then cries because she has lost her beloved Percy. Maybe she blames herself for not being able to protect him, and the rest of the story could be about how she copes with this great loss, like she might try to carry on Percy's legacy or find a way to bring him back in some magical way.
There's a fanfic I heard about called 'Percy's Heartbreak over Annabeth'. In this, perhaps Annabeth has made a choice that seems to distance her from Percy, and his cries are a result of his broken heart. Another fanfic could be 'Crying for Annabeth: Percy's Struggle'. Here, Percy might be crying because Annabeth is captured by an enemy and he's desperate to save her. And 'The Weeping of Percy for Annabeth' might focus on Percy's emotional state when Annabeth is in a coma, and his tears are a sign of his undying love for her.
It could be an ancient and powerful god or goddess who has a grudge against Percy. Maybe they see Percy as a threat to their power or plans, so they plot his death. For example, a forgotten deity who wants to regain their former glory by getting rid of Percy, who is often seen as a hero in the Percy Jackson universe.
Their relationship is likely to be complex. They are friends and comrades who have fought side by side many times. So, there's a strong bond of loyalty between them.
Their shared experiences play a big role. They've been through so much together, like countless battles and adventures. Percy has seen Annabeth in tough situations and he knows how strong she is, but also how vulnerable. So he feels the need to protect her. For instance, they might have had a close call in a previous adventure where Annabeth was nearly killed, and that memory makes Percy extra vigilant.
Percy might be a bit flustered and embarrassed. He's protective of his relationship with Annabeth, so having Magnus walk in might make him feel like their privacy has been invaded. He could quickly try to shield Annabeth or just look really shocked.