It's possible that some of the more traditional and strict gods could be antagonists. They might view Aphrodite's act of adopting a mortal boy as going against the natural order. These gods could try to separate the boy from Aphrodite, either by tricking the boy or by putting pressure on Aphrodite. There could also be a dark force or a cursed entity in the story that targets the boy because of his connection to Aphrodite, seeing him as a way to get back at the goddess of love.
There could be a dark god or goddess, perhaps from the underworld, who sees Aphrodite's adoption of the boy as a disruption to the natural order. This deity might believe that mortals should suffer and that Aphrodite is interfering too much. So, they send their minions to kidnap the boy or try to corrupt his soul, so that Aphrodite would lose her beloved adopted son and be in despair.
In this fanfic, Aphrodite could adopt the boy for various reasons. It could be that she's lonely and wants a companion. The boy's journey would be interesting. He might struggle to fit into the new world with a goddess as his mother. There could be conflicts, like other gods being jealous or suspicious of the boy. But Aphrodite would be there to guide him. She could give him gifts, like the ability to charm people, which he could use for good, and in the end, he might become a great advocate for love and kindness just like Aphrodite.
The plot could involve Aphrodite seeing the little orphan boy in a desolate place, perhaps a war - torn area or a poor village. She takes pity on him and decides to adopt him. She then uses her powers to give him a new life, maybe endowing him with some special abilities or just protecting him from all the evils of the world.
Well, it could be about Bones, who might be a kind-hearted character, taking in the little orphan boy. Maybe she shows him a new way of life, helps him with his education and emotional growth. They could form a really strong bond like a family.
Perhaps there's an antagonist, like a person from the orphanage who has some ulterior motives. Maybe this person doesn't want Bones to adopt the boy because they have other plans for the child. But Bones has to fight against this person to keep the boy.
Another character could be a villain who is hunting down any remaining Targaryens. He sees the orphan boy as a potential threat because he might grow up to claim power. This villain adds conflict and danger to the story, forcing the orphan boy and his newfound friends to constantly be on the run and develop strategies to outwit him.
Perhaps there are some anti - Uchiha elements within the village that are not happy with Naruto adopting Sarada. They could try to undermine her training or create problems for Naruto and Sarada. They might spread false rumors or try to isolate Sarada from the rest of the village.
It could be other villages that see the alliance between the Raikage and Naruto as a threat. For example, some of the more power - hungry villages might fear that the combination of the Raikage's strength and Naruto's abilities would tip the balance of power in the ninja world. So, they would try to undermine their relationship or even attack them directly.
Some of the old monsters from Greek mythology that have a vendetta against Aphrodite's lineage could be the main antagonists. Maybe a spurned former lover of Aphrodite who was turned into a monster. This monster targets the daughter of Aphrodite and Percy because they are symbols of Aphrodite's power and influence. It constantly tries to harm them and thwart their plans.
The plot could revolve around the orphan boy's discovery of his Targaryen heritage. Maybe he finds an old relic or meets someone who tells him he has Targaryen blood. This could lead him on a journey to claim his rightful place in the world of the Targaryens.