Ichigo can be developed by giving him new powers or abilities related to his connection with the goddess. This could be a way to show his evolution in the fanfiction. The goddess, on the other hand, can be developed by exploring her backstory. Why is she in the human world? What are her goals? By answering these questions, her character becomes more complex and interesting.
Ichigo could develop a darker side to his personality. He might be more isolated at first, but Orihime's love and kindness slowly draw him back. Orihime, on the other hand, could gain new powers related to vampires that change her perception of herself and her role in their relationship.
Rukia, on the other hand, can be developed by exploring her cultural background more. Since she's from a different world, her reactions to the more 'lemon - like' or romantic situations could be influenced by her Soul Reaper upbringing. For example, she might initially be more reserved but then gradually open up as she falls deeper in love with Ichigo.
The relationship could develop through shared experiences. For example, if they both get trapped in a strange dimension in the Bleach world. They have to rely on each other to survive. Ichigo could teach Femichigo about his human side, and Femichigo could show Ichigo new ways to use his spiritual power. This mutual exchange would bring them closer together.
Hollow Ichigo's character development could involve him gradually learning to control his power in a more positive way. He could start to use his Hollow abilities not just for fighting but also for protecting. Dark Rukia could be developed by having her face the consequences of her dark actions. This could lead to a journey of self - discovery where she tries to find a balance between her dark and light sides.
Perhaps the goddess has the ability to see different timelines. She sees a future where Goku is the most important figure in the universe's survival. So she travels back in time to meet him when he's still young. She becomes his mentor, guiding him not just in power but also in understanding the greater cosmos. As Goku grows up, he starts to see her not just as a mentor but as a love interest, and they develop a relationship that spans different stages of Goku's life.
One idea could be that Ichigo discovers he has a hidden connection to the goddess realm. Maybe he is a chosen one to protect the goddess from an ancient evil. For example, he could have special powers that are awakened only in the presence of the goddess.
The cat goddess could be developed by giving her a complex backstory. For instance, she could have been a normal cat once who was blessed by a powerful force. This backstory would add depth to her character.
The relationship can be developed through shared experiences. For example, if they face a difficult battle together, they will start to rely on each other more. This can break down the initial barriers between them. Another way is through communication. If they start to talk about their feelings, fears, and goals, they will understand each other better.
For Ichigo, his character could be developed by exploring his inner turmoil more deeply. Maybe he struggles with the idea of being half - human, half - Shinigami in a different way. As for Rukia, she could be developed by showing more of her past, like her early days in the Soul Society before she met Ichigo. This would give more depth to her character.
The new addition to their family could also make them more open about their feelings for each other. They might realize how much they truly care for one another while watching their baby grow. This could lead to more affectionate moments between them and a more solid romantic relationship.