The lioness would face the challenge of feeding the human child. A lioness's diet mainly consists of meat, which is not suitable for a human child. She would need to find alternative food sources like fruits or roots, which might be difficult in her natural habitat.
The story could also explore the reactions of the animal kingdom to this strange adoption. Other lions might be confused or even hostile towards the lioness for taking in a human. Meanwhile, the human community might be in shock when they discover the child is being raised by a lioness. They would have to decide whether to try and rescue the child or let nature take its course.
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.
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.
Rarity would use her natural grace and poise to handle parenting. She'd start by dressing the child in the most stylish outfits, of course. And she'd likely be very strict about manners, as she values propriety.
First, create interesting characters. The adopter should have unique traits and the child should be relatable. For example, if the adopter is a dragon, give it a distinct personality. Then, develop a strong plot. Maybe the child has a special mission and the adopter helps them. Also, show the growth of the relationship between the two.
It could be an orphaned wizard child from a family that was killed by Death Eaters. This would give Snape an added sense of responsibility as he might feel guilty for being associated with the Death Eaters in the past.
Maybe a Pikachu adopts a human child. The Pikachu is part of a group of Pokemon that live near a human village. The child was abandoned, and the Pikachu takes it in. They go on adventures together, with the Pikachu protecting the child from other wild Pokemon and teaching it how to communicate with different Pokemon species.
Squirtle. Squirtle is cute and friendly. If it adopted a human child, it could show the child the underwater world of Pokemon. The Squirtle could teach the child how to swim, and they could explore underwater caves together. It would be a really fun and light - hearted story with Squirtle as the main Pokemon.