She could be really spunky and full of energy, just like her Raichu parent. Always ready to take on new challenges and explore new areas in the Pokémon world.
One possibility could be that Raichu's daughter has unique electrical powers that are different from her parent. Maybe she struggles to control them at first, but through her adventures, she learns to master them. For example, she might accidentally short - out all the electric systems in a Pokémon center while trying to charge up a Pikachu that's been injured. This could lead to her making new friends who help her train and understand her powers better.
She could be very calm and collected, like her father. Gaara was known for his stoic nature, and she might inherit that. But she could also have a hidden sense of humor that only those close to her know about.
She could be very inquisitive. Since Belle loved books and knowledge, she might pass on that trait to her daughter. So, the daughter would always be asking questions, eager to learn about the world around her, whether it's the secrets of the enchanted castle or the stories of the villagers.
She could be strong - willed, just like Bellamy. In the fanfic, she might always stand up for what she believes in, even if it means going against the majority. For example, if there's a decision in the community that she thinks is wrong, she'll fight for a better solution.
She might have a Bulbasaur. It's a classic starter Pokemon and it could symbolize a connection to Ash's early days as a trainer. Also, Bulbasaur can be very strong and useful in battles as well as contests with its cute appearance.
She might have a Eevee. Eevee is a very adaptable Pokemon and could evolve in different ways depending on her experiences, just like her character would develop in the story.
She could be very headstrong. Growing up as a Malfoy, she might have a sense of pride but also a rebellious streak. She doesn't want to just follow the rules set by her family's legacy.
Maybe it's a fanfic where Ash gets transported to an alternate Pokemon world where Alolan Raichu is more common and he's lucky to start with one. The possibilities are endless!
It could be portrayed as a moment of great transformation. Ash might be hesitant at first, but realizes the potential of a Raichu. The evolution could be triggered by a very powerful opponent that makes Pikachu see the need to evolve. Then, as Raichu, it could start showing off new moves and a more confident attitude, which Ash would have to get used to.
Well, she could be highly intelligent like Hermione. Maybe she'd be a bookworm, always with her nose in a tome, eager to learn new spells and knowledge. At the same time, she might inherit Draco's sense of pride. So she'd be confident in her abilities and not easily intimidated. However, she could also have a kind heart, a blend of Hermione's compassion and Draco's loyalty to his own, which in this case would be his family.