With Yang, their sisterly bond would still be strong but would manifest in different ways. Yang might be more protective in a non - huntress scenario, as Ruby would be less trained in combat. But at the same time, Ruby could offer Yang new perspectives on things outside of the huntress world. They could explore different career paths together, support each other's personal growth, and have a more domestic yet equally strong relationship, sharing their daily joys and sorrows without the constant threat of Grimm battles.
In this fanfiction, Ruby could become a teacher. She would teach the next generation about the history of the huntsmen and huntresses, as well as the importance of unity and courage. By passing on her knowledge and values, she still plays an important role in the fight against the Grimm, just in a different way than being a huntress. She could inspire students to become great huntsmen and huntresses, and also share her combat experiences to help them in their training.
If Ruby turns into a Grimm in fanfiction, her relationships would be severely strained. Her friends in Team RWBY would be confused and scared at first. Weiss might be especially distrustful, given her family's views on Grimm. Blake, who has her own history with being an outcast, might be more sympathetic but still cautious. Yang would be heartbroken but determined to get her sister back to normal.
Ruby's relationship with Ozpin could be very different. Ozpin might see Ruby as a unique asset to the fight against Salem. He could give her special training to master her part - weapon abilities. This would lead to a more mentor - like relationship. In terms of her classmates, some might be afraid of her new form at first. But as they see how she uses her powers for good, they would grow to accept and respect her more. Her relationship with Pyrrha could also be interesting. Pyrrha, being a skilled fighter, might offer to spar with Ruby to help her get used to her new abilities.
She could develop a more cynical view of the world. In the face of abuse, her naivete might be replaced with a sense of wariness. For example, she may be less likely to trust new people or situations easily. Ruby might also become more determined in a different way. Instead of being determined to be a great huntress in the normal sense, she could be determined to overcome the abuse and prove that she can't be broken.
Ruby might become more isolated. Her new powers set her apart from others. Her friends may not be able to fully understand what she is going through, and she may start to feel alone in her new state of being. For instance, she may have powers that are beyond their comprehension, and simple conversations about daily battles or hunts become difficult as she now has a different perspective on power and danger.
One possible reason could be if she experiences a major loss, like losing a dear teammate in a very tragic way. This might shatter her confidence and make her question whether she's cut out for the dangerous life of a huntress.
Ruby's sleepwalking might also lead to some misunderstandings. If she sleepwalks into Weiss's personal space, Weiss might initially think Ruby is being rude or inconsiderate. But once they figure out it's because of her sleepwalking, it could lead to a deeper understanding between them. Weiss might become more empathetic towards Ruby's involuntary actions, and they could become closer friends.
With Weiss, their relationship could be more strained at first. Since Weiss has some preconceived notions about Faunus, she might be initially distrustful of Ruby. But as time goes on, they could overcome this. With Blake, they might bond more deeply as they both share the Faunus experience in a way. And with Yang, Yang would be very protective of Ruby, especially if Ruby faced any discrimination because of being a Faunus.
She might have a more ethereal look. Her hair could start to have a slight greenish tint, like the first buds of spring. There could be a soft glow around her, especially when she uses her Spring Maiden powers.
Often, their relationship is depicted as one of great inspiration. Ruby looks up to Summer as a heroic figure. Since Summer was such a renowned Huntress, Ruby wants to be just like her. It's a relationship filled with a sense of legacy, where Ruby is constantly striving to live up to what she believes Summer would have wanted for her.