Well, identity crisis is very common. Sonic is used to being a blue hedgehog with super speed, but when he becomes human, he has to re - evaluate who he is. Adaptation to a new physical form and a different set of abilities or lack thereof is also a theme. And then there are the themes of friendship and love. His relationships with his friends might change, and he might even find new romantic interests in his human form. For example, in some fanfictions, Sonic has to learn how to communicate his feelings in a more human way, which was not necessary when he was a hedgehog.
In sonic human form fanfiction, a recurring theme is the exploration of Sonic's new physicality. As a human, he has different limitations and possibilities compared to his hedgehog form. This leads to themes of self - discovery and growth. Another common theme is the reaction of others to his new form. His friends, enemies, and the general public in the fanfiction world all react differently, which creates interesting storylines. Additionally, the theme of power also comes up. Some fanfictions explore whether Sonic's speed is still as potent in his human form or if he has to develop new powers or skills.
Romance is a huge theme. Many fanfictions focus on Sonic and Amy's relationship, exploring how their feelings develop for each other in their human forms. It could be a slow - burn romance or a more immediate attraction.
Overcoming challenges together is also a big theme. Whether it's fighting a powerful villain or finding a way to get the girl back to her own world, Sonic and the human girl have to work as a team. This theme emphasizes their bond and how they rely on each other's strengths. In some fanfictions, the girl's unique human skills like problem - solving or her knowledge of certain things are combined with Sonic's super speed and combat abilities to defeat their enemies.
Friendship is also a big theme. The human OC usually forms strong bonds with Sonic and his friends. They learn from each other and support one another in their battles against villains. It shows how different beings can come together for a common good.
A common theme is power exploration. Since Sonic is the ultimate life form, many fanfictions focus on his powers, how he got them, and how he uses them. For example, some stories might show Sonic learning new ways to control his speed or strength.
One common theme is deception. Since Kyubey is known for being manipulative in the original series, in human form he often uses his appearance to deceive others, especially when it comes to recruiting magical girls.
One common theme is the struggle between her kaiju nature and her human form. For example, in many stories, she has to deal with emotions and limitations that are new to her in human form.
One common theme is adventure. They might go on quests together. Another could be friendship, showing how their relationship develops over time.
A major theme is also self - discovery. The human reader in these fanfictions usually discovers new things about themselves while being with Sonic. For example, they might find out they are braver than they thought. And of course, the theme of good versus evil is present as they often have to face Dr. Eggman together. These fanfictions show how the human and Sonic's combined efforts can defeat the bad guys. It's a great way to see the human character grow and develop in a world full of chaos and action.
One common theme is his adjustment to the human world. Since he's from a different form originally, how he copes with human emotions, relationships, and society is often explored.
One common theme is identity. As Amaterasu takes on human form, she has to figure out who she is now. Is she still the same divine being or has becoming human changed her fundamentally?