Naruto could be a great supporting character. He might visit Sakura often, bringing her his positive energy and some of his favorite ramen to cheer her up. His unwavering belief in her could be a source of motivation for Sakura during her rehab.
Ino could be a supporting character. Since she and Sakura have a complex relationship, she could come to the rehab center with beauty products to make Sakura feel better about herself during a difficult time. Ino could also share some of her own insecurities and how she overcomes them, which would be inspiring for Sakura.
I think Hinata would be a great supporting character. Hinata is very empathetic and kind. She would be there to listen to Sakura's concerns and offer her quiet support. Also, Kakashi could play an interesting role. He might not fully understand what's going on but still offer his general wisdom and support to Sakura in his own unique, laid - back way.
Her best friend could be a supporting character. This friend might suspect something is wrong but Sakura keeps denying it. The friend could be torn between respecting Sakura's privacy and trying to help her. Another could be a kind neighbor who notices Sakura's strange behavior but doesn't pry too much at first.
Her old friends from her previous life in the town could be the supporting characters. They could initially be skeptical about her return and her intentions to do good deeds, but as they see her efforts, they start to support her. For example, her childhood best friend could provide emotional support and help spread the word about Sakura's projects in the community.
For a 'sakura in rehab fanfiction', Sakura could be in rehab for an addiction to a powerful but dangerous medical herb she was using to enhance her healing abilities. She realizes the negative impacts it has on her body and mind. As she goes through rehab, she discovers new ways of healing that don't rely on such harmful substances and also learns more about herself and her limits.
Ino could be a great supporting character. As Sakura's friend, she could offer emotional support, perhaps share her own experiences or just be there to listen. Kakashi could also play a role. He might offer some sage advice on balancing family and ninja duties, drawing from his own experiences. And of course, Naruto. He could be the one to bring some cheer and positive energy, and maybe even offer some practical help like getting hard - to - find supplies for the baby.
Ino is often a supporting character. Ino and Sakura have a long - standing friendship - rivalry thing going on, and in training fanfictions, Ino can be there to either compete with Sakura or support her in her growth. Naruto and Sasuke are also typical. Naruto's positive attitude and Sasuke's skill can inspire Sakura in her training. Kakashi, as their teacher, is another one. He might guide Sakura in her training, give her advice, and help her develop new techniques.
Often, Naruto could be a main supporting character. He is their friend and might visit them, offer advice, or get involved in some comical situations. Kakashi could also be a support, perhaps mentoring them on certain aspects of married life or giving Sasuke some missions that impact their family life in some way.
Sasuke's mother could be an interesting supporting character. She could share stories of Sasuke when he was a baby with Sakura, which would make Sakura feel more connected to Sasuke and the family. And Kakashi could also be there. He might offer some wisdom and calm reassurance during Sakura's pregnancy journey, just like he has always been a guiding figure for his students.
One potential supporting character could be a new ninja from a far - off village. This ninja could come to Konoha for some sort of exchange program. They meet Sakura and start to show her a different world outside of the Sasuke - centered one she's been in. Additionally, Sakura's parents could be supporting characters. They could provide a family - centered perspective, reminding Sakura of the love and support she has at home and that she doesn't need to base her self - worth on Sasuke. Also, Lee could be there, with his unwavering determination, inspiring Sakura to be strong and move forward.
Bellatrix could be a supporting character. She might have a complex reaction to Narcissa's pregnancy. On one hand, she could be happy for her sister, but on the other, her loyalty to Voldemort and the dark arts could make her view the new life as a potential weakness or a distraction. Another supporting character could be Narcissa's maid or house - elf. They would be there to take care of her needs during pregnancy, like preparing special meals and making sure the house is in order for the baby.