In a mystery - themed fanfic, the act of covering his mouth while yawning might be a clue. Maybe he's hiding something, like a mark on his face or a strange discoloration of his gums. It could also be that he has a secret power that activates when he yawns, and covering his mouth is part of his attempt to keep it under wraps.
It can be important for character development. If a character is always very proper and covering their mouth when yawning, it shows their good manners and self - discipline. This could be a key part of their personality that is either endearing or off - putting to other characters in the fanfic.
In some fanfics, yawning might make a character seem tired or bored, which could lead to certain plot developments or interactions with other characters.
It could be that his parents were trying to protect Harry in a really messed - up way. They might have thought that by 'betraying' him, like sending him away or making him seem like an outcast, they could keep him safe from a much greater threat. Maybe they knew some prophecy about Harry and thought this was the only way to ensure his survival. They might have made a deal with some dark force, believing they could outwit it in the end but ended up being seen as traitors by Harry and others.
One possible plot could be that Voldemort's lover discovers his true dark nature and decides to leave him. This shatters Voldemort as he realizes he has lost the one person who saw something good in him. It could lead to a downward spiral in his character, making him even more bitter and vengeful towards the world.
Well, perhaps the grandfather could be teaching Harry all kinds of magic that his parents didn't have the chance to. He might introduce Harry to a different side of the wizarding world, full of old family secrets and forgotten spells.
One possibility is that Percy relives his life and focuses on training more intensively. He could learn new skills or magic earlier, which would change the course of his adventures. Maybe he would be more strategic in battles, and as a result, save more people and gain more respect in the demigod community.
Well, in such a fanfic, perhaps Percy ends up in a new camp or place full of demigods he doesn't know. He has to prove himself without his mom's support. He could befriend some unlikely characters who help him understand more about his mother's disappearance. And in the end, he might find that his mom left to protect him from a greater threat that he now has to face on his own.
Maybe in the fanfic, there's a powerful villain who has a device that can nullify superpowers. Beast Boy gets caught in the range of this device and loses his powers. He struggles with feelings of uselessness at first. But then he realizes that his skills as a strategist and his knowledge of the Titans' operations are still valuable, and he uses those to help the team in a different way while also searching for a power restoration method.
One possibility is that Harry leaves Hogwarts to go on a solo adventure to find more about his family's past. He might travel to different wizarding communities that his parents were associated with, uncovering secrets along the way.
One possible plot could be Fem Naruto's journey to prove herself in the ninja world despite her relatively small stature of 4 foot 7. She might face discrimination or underestimation from others at first. But through her unique skills and unwavering determination, she overcomes these obstacles and earns the respect of her peers. For example, in a mission, she uses her agility and quick thinking, which are enhanced by her smaller build, to outwit much larger opponents.