In a family with two such powerful demigods, there could be a power struggle within the family itself. Their children might grow up feeling the pressure to live up to their parents' reputations. Moreover, Percy and Annabeth would have to decide how much of the demigod world they expose their kids to at a young age. If they expose too much too soon, it could be overwhelming for the children, but if they wait too long, the kids might be unprepared for the threats that come with being a demigod.
One challenge could be office gossip. People might start talking if they notice Percy and Annabeth getting too close. This could create a difficult work environment for both of them. Another challenge is the power dynamic. Percy has to be careful not to abuse his power as a boss when it comes to his relationship with Annabeth.
One big challenge could be competition among other researchers. In the fanfiction world, there could be rival marine biologists who want to be the first to discover something new. Percy might also face environmental threats. Things like pollution ruining the habitats he's studying or climate change affecting the behavior of the marine life he's researching. He'd have to find ways to work around these issues to continue his work.
One challenge could be the public perception. The wizarding world may not be very accepting of Hermione raising Voldemort's daughter. There could be a lot of fear and suspicion. Another challenge is Delphini's own nature. Since she has Voldemort's blood, she might have some inborn dark tendencies that Hermione has to constantly fight against. Also, Hermione would have to deal with the memories and legacy of Voldemort that might be a part of Delphini's upbringing.
One challenge Naruto might face is Gaara's past traumas. Gaara has been through a lot of pain and isolation, which has made him distrustful. It would be difficult for Naruto to break through those barriers and get Gaara to open up. Another challenge could be the political situation. Suna and Konoha have had their differences in the past, and some in Suna might not be happy with Naruto's influence on Gaara. Naruto would have to deal with any potential political unrest or opposition from those who don't trust Konoha.
He could face difficulties in adapting to the new work environment. If it's a very hierarchical place, he might struggle with the strict chain of command. For instance, if he has an idea but has to go through multiple levels of approval before implementing it. Also, the work might be very different from what he learned at Hogwarts. So he'd have to unlearn some things and learn new techniques quickly.
Financial challenges can also be a part of it. If the shemale family member wants to have certain medical procedures related to their gender identity, like hormone therapy, it can be expensive. And the family might have to struggle to afford it while also taking care of other family needs. Also, in some cases, family members might face discrimination at work because of their association with a shemale family member, which could lead to potential loss of income.
One challenge could be dealing with their different personalities. Each sibling might have their own desires and goals. For instance, one might be more interested in military matters while another in the arts. Rhaenyra would have to find a way to nurture all of them individually.
One big challenge could be Snape's natural inclination towards the Dark Arts. Harry would have to constantly keep an eye on Snape and try to steer him away from that path. Also, Snape's personality is often prickly and guarded. Harry would need to break through those barriers to really connect with him. Another challenge might be the expectations of the wizarding community. People might not understand why Harry is raising Snape and could be suspicious or judgmental.
One challenge could be the differences in their village cultures. Konoha and Suna have different traditions, and they might have to find a way to blend them for their family. For example, in terms of how their children are trained as shinobi.
They'll likely face financial challenges. Raising a child requires money for food, clothes, and shelter. And with their lives often in danger, they need to figure out how to keep their child out of harm's way. There could also be a challenge in terms of their own relationship. The stress of impending parenthood might put a strain on their bond, especially if they have different ideas about how to raise the baby.