Well, a simple idea could be that the pregnancy is a secret at first. Only a few close allies know. Jon and Daenerys have to be very careful to keep it that way. They might have some close calls where the secret almost gets out, adding a lot of tension to the story.
Well, Hermione is known for her intelligence and rational thinking. When she sees Harry's scars, she might first try to analyze them. Maybe she'd wonder about the magic that caused them, and if there are any lingering effects. This could lead her to research more about dark magic or the spells that left those marks. At the same time, she'd also have an emotional response, perhaps feeling a bit of anger towards those who hurt Harry.
She might be shocked at first. Fleur is used to beauty and perfection, and Harry's scars are a sign of his many battles and hardships. So she could show a moment of wide - eyed surprise.
He might be initially shocked. Snape has a complex relationship with Harry, and seeing those scars which are a mark of Harry's past and his connection to Voldemort could stir up a lot of mixed emotions in Snape. Maybe he would feel a pang of guilt, as he has some role in Harry's life due to his connection with Lily.
In the fanfiction 'Ino Sees Naruto's Scars', it could be a very emotional moment. It might show Ino's new understanding of Naruto's past hardships. Maybe she realizes how much he has been through and it could lead to a deeper connection between them.
They could be from a fight with a powerful magical being. Maybe Loki tried to steal a powerful artifact from a wizard or a sorcerer, and in the process, he got injured and the scars remained.
Tyrion Lannister could be involved. He was close to Daenerys and had a relationship with Jon as well. He might be the one to help protect the baby or offer his wisdom in raising the child. Another character could be Ser Davos. He was loyal to Jon and would surely be interested in safeguarding the future of Jon's heir.
Jason might be shocked at first. He could feel a sense of respect for Percy, knowing that those scars are the marks of his many battles and hardships. Maybe he would be more curious about Percy's past adventures that led to those scars.
The scars might be a symbol of Percy's loyalty. He has fought for his friends and the world, and the scars are the physical reminders of his selfless acts. In the fanfiction, when Jason sees them, he might understand Percy's true character better. Also, the scars could be a connection to Percy's past loves and losses. They might have stories related to people he cared about deeply and lost, or relationships that were strengthened through the battles that left the scars.