Another issue could be protecting Raphael from those who might want to harm him. In the world of the fanfiction, there could be enemies of Magnus or Raphael's family who would see a baby as an easy target. Magnus would have to be constantly vigilant and use his magic to keep Raphael safe at all times.
One challenge could be understanding baby Raphael's needs. Since Magnus may not have had much experience with babies, he might struggle to figure out why Raphael is crying - whether it's because he's hungry, tired, or in need of a diaper change.
The story could explore the bond that forms between Magnus and baby Raphael. Since Magnus has such a long life and a lot of experiences, he would be in a unique position to shape Raphael's early life. He might tell Raphael stories of his adventures, and as Raphael grows, these stories could inspire him to be brave and kind.
Magnus would likely use his powerful magic. He could create wards around the place where Harry is staying. These wards would be strong enough to keep out any dark wizards or creatures. He might also give Harry a charmed amulet that has protective spells on it.
Trust could be a big issue. Since they've broken up before, there might be lingering doubts. Alec might worry that Magnus will leave again, and Magnus might be afraid that Alec will let the rules of the Shadowhunters come between them. They need to work through these insecurities if they want to get back together.
One heartwarming scenario could be Magnus using his magic to create a beautiful, enchanted nursery for baby Harry. He could fill it with floating toys and a crib that rocks itself gently. Another might be Magnus cooking special baby food for Harry with a touch of magic to make it extra delicious and nutritious. Maybe he'd also read him magical bedtime stories that bring the pictures to life on the walls of the room.
One challenge could be getting Hermione to eat. Babies can be picky eaters, and in the wizarding world, there might be special potions or foods that Hermione needs but doesn't like. Another challenge is keeping her safe from magical accidents. With all the magic around, a simple spell could go wrong and put Hermione in danger.
The villains might use the baby as a human shield. Spiderman would have to be really careful not to harm the baby while trying to get past the villains. He'd have to use his wits and his web - slinging skills in a very precise way to disarm the villains without putting the baby in danger.
Maybe it's the child of one of his friends or allies. For example, it could be the baby of Ron and Hermione. Harry would then be taking care of the baby out of loyalty and friendship.
Family and friends' support is another crucial part. In the fanfiction, we often see how their friends like Jace and Clary help them out, whether it's babysitting or just giving advice. This shows the importance of community within the Shadowhunter world when it comes to raising a baby.
A challenge could be that the baby niece won't stop crying. The uncle might try different things like singing a soft lullaby or rocking her gently. If that doesn't work, he might check if she needs a diaper change or is hungry. Eventually, he figures out what's wrong and calms her down.
One challenge Percy will face is the lack of experience. He's used to fighting and surviving in a dangerous world, not taking care of a tiny, helpless baby. Another challenge could be dealing with the baby's needs at odd hours. Babies don't follow a set schedule, and Percy, who is used to a more action - packed day, might find it difficult to adjust.