Maybe it could be about his friends discovering this strange habit and trying to figure out what his sleep - talking means. For example, they might think he's revealing secrets or just having really odd dreams.
Harry Potter could be one of the main characters. Since he has a complex relationship with Draco, he might be intrigued by Draco's sleep - talking and try to use it to gain some understanding of Draco or even to tease him.
Perhaps in this fanfiction, Naruto is facing an enemy who can manipulate the forest against him. So, he decides to communicate with the trees to form an alliance. The trees, understanding Naruto's pure heart, agree to help him. Together, they create a strategy to defeat the enemy. Naruto might also learn new techniques from the trees, like how to use the roots as a defense mechanism.
Well, it could be about Harry seeking the dragon's help to find a hidden magical item. Maybe the dragon knows the location of an ancient artifact that can defeat a dark wizard. So Harry has to communicate with the dragon, overcome his fear first, and then persuade it to share the secret.
One possible plot could be that Athena is giving Percy some strategic advice for an upcoming battle. Maybe she's warning him about a new type of monster he'll face and how to defeat it using his wits.
In the fanfiction, Jasper might be talking to Bella about her transformation. He could be discussing the pros and cons of becoming a vampire fully. He might share his own struggles with adapting to the vampire lifestyle and how it affected his relationships. This conversation could also lead to a deeper understanding between them and potentially change the dynamics of Bella's relationships with the other Cullens.
One possible plot could be that Hermione is seeking advice from Bill about curse - breaking. Since Bill is an experienced curse - breaker, Hermione wants to learn more about it for her own studies or for a mission she's on. They meet in the Burrow's garden, and Bill shares his exciting tales from his adventures, which both educates and amuses Hermione.
Well, it could be that the dragons are in danger due to some dark magic. Harry talks to them to figure out a way to save them. In the process, he learns more about the magical world of dragons and their history. He might even find out that the dragons have a connection to the founders of Hogwarts.
Well, perhaps Harry is feeling lonely and decides to talk to Mrs Black's portrait. He tries to reason with her about the changing times and how pure - blood mania is wrong. Mrs Black, being stubborn at first, slowly starts to listen to Harry. She might then share some tales from her youth that give Harry new insights into the wizarding world's past social structure.
Perhaps Sherlock discovers the child through a case. He then talks to the child in a gentle way, getting the child to open up about their abuse. This could lead to a series of investigations to bring the abuser to justice and also help the child regain trust in the world. He might use his intelligence to find resources for the child, like a safe place to stay or a counselor.
It could be about Draco having some deep self - reflecting moments while in the shower. Maybe he's thinking about his past actions at Hogwarts and how he wants to change.