One common theme is the idea of family. The dragon and the human child form a unique family unit, often defying the norms of both their species. Another theme is acceptance. The dragon has to accept the human child as part of its life, and the child has to accept living with a dragon, which is a very different kind of existence.
There's also a series where a dragon adopts a human child during a war. The child has special powers that the dragon recognizes. As the story progresses, the dragon protects the child from various threats while the child learns to accept its new life with the dragon. It's really an interesting take on the concept.
One common theme is friendship. Like in many stories, the dragon and the human start as strangers but gradually become friends and rely on each other. For example, in 'A Dragon's Friend', the human helps the dragon when it's trapped and in return the dragon protects the human from danger.
Power is also a major theme. Since they are the child of a dragon, they usually possess great and sometimes uncontrollable power. The story may revolve around how they learn to master it. Another theme is discovery. They discover their heritage, new magical places, and secrets about the dragon world as the story progresses.
One interesting story could be about a powerful wizard who adopts a human child with special powers. The wizard teaches the child magic and they go on adventures together. Another might be a story where an alien adopts a human child and tries to understand human culture while raising the child in a very different environment.
The storyline could involve Rarity introducing the human child to the world of Equestria. She might teach the child about fashion and elegance, as that's her forte. The child could also learn valuable lessons from Rarity's friends, like loyalty from Rainbow Dash or kindness from Fluttershy.
One common theme is cultural exchange. Since humans and asari are different species, there's often a focus on how the human and asari child learn from each other's cultures. For example, the asari might teach the human about their biotic abilities, while the human shares things like their sense of family structure.
Friendship is a very common theme. Just like in the original MLP series, the human child often forms strong bonds with the ponies or other characters. For example, they might go through adventures together and rely on each other.
Another theme is power. Dragons are often depicted as powerful creatures in these fanfictions. So, when a human turns into a dragon, they have to deal with the sudden influx of power. This can lead to either using it for good or being corrupted by it. For instance, in some stories, the newly - turned - dragon character has to resist the temptation to use their power for selfish reasons. It's also about identity. The character has to figure out who they are now that they are a dragon. Are they still the same person? Or has their new form changed them completely? In many stories, the character struggles to reconcile their human self with their new dragon self.
One common theme is friendship. The human and the stardust dragon often form a strong bond of friendship that helps them through difficult situations. For example, they might support each other during battles or while exploring new places.
A frequently seen theme is the idea of redemption. As Smaug was a rather evil dragon, the fanfictions often explore if the dragon child can break free from that negative legacy. There's also the theme of discovery. The dragon child discovers new places, new friends or foes, and new aspects of itself. For instance, it might discover a love for beauty in a world it was taught to only see as something to conquer. This discovery can lead to a change in its character and goals.