Yang would be very emotional. She'd be heartbroken that Ruby doesn't remember their shared experiences. She might try to recreate memories, like taking Ruby to their favorite childhood places. Weiss would take on a more practical approach. She'd research any possible cures for amnesia in the RWBY world, whether it's through dust or some other means. Blake would be the quiet support. She'd stay by Ruby's side, listening to her when she's confused and gently guiding her through the things she doesn't understand.
I think Naruto's friends would be quite shocked. For the more traditional ninja like Neji (if he were still alive in this fanfic), he would see the gun as an abomination to the ninja way. However, Naruto's closest friends like Kiba would be more open - minded. Kiba might see it as a cool new weapon and want to see what it can do. But overall, they would all be concerned about how Naruto got the gun and what it means for their world of ninjas.
Ron's friends from school could be divided. Some might ostracize him for getting involved with a known villain like Shego. Others, who are more open - minded, could see the situation as an opportunity for Ron to change Shego for the better. And Shego's villainous acquaintances might try to use the pregnancy to their advantage, either by blackmailing Ron or trying to turn Shego against him.
A possible plot development is that Ruby's amnesia could be a result of some dark magic or a new type of Grimm attack. As she tries to recover her memories, she discovers new powers within herself that she didn't know existed before. This new power could be related to her amnesia in some way, like it was locked away and the amnesia event somehow unlocked it. Meanwhile, her friends are on a quest to find a way to reverse her amnesia, which leads them to encounter new allies and enemies along the way.
Olaf would try to make Anna laugh. He would tell his silly jokes and do his goofy dances. He would also try to keep Anna warm with his carrot nose. He might even build a small snowman inside the room to keep Anna company when everyone else is busy.
Well, initially, her friends would be stunned. Harry would be at a loss for words. He'd be thinking about all the times they had together and how Hermione's appearance was part of who she was. Ron would probably blurt out something insensitive in his shock. But as time passed, Harry would start to see that Hermione was still the same person inside. Ron would slowly come around too, especially when he realized that Hermione's decision was more complex than he first thought. Ginny would be the one to really help Hermione feel accepted, reminding her that her true self was more important than her new look.
Her friends would likely be very protective. They might form a sort of guard around her, making sure she's safe at all times. Some of them would probably be excited about the new life coming into the world and start preparing things like a nursery or gathering supplies for the baby.
She would likely become more confident. Having a system at her disposal gives her an edge, and as she starts to rely on it and see the positive results, her self - assurance would grow. This could change how she interacts with her team, being more assertive in her decision - making.
Weiss would probably be very protective at first. She has always had a bit of a mother - hen side to her, and seeing Ruby in a more vulnerable, deaged state would bring that out. She would likely try to keep Ruby out of trouble and make sure she was taking care of herself.
Her friends would likely be very shocked and worried. Some might rush to the hospital immediately and stay by her side, constantly checking on her condition. For example, her best friend might be in tears and refuse to leave until they know Bella is out of danger.
The other members of Team RWBY would be deeply affected. They would start to question their own abilities and the purpose of their fight. Some might withdraw into themselves, like a broken Weiss who shuts out the world for a while. Yang, on the other hand, could become reckless in her pursuit of vengeance, endangering herself and others. Blake would try to hold the team together, but she would also be mourning privately. The other friends and allies in the RWBY universe would also be in mourning. Qrow might blame himself for not being there to protect Ruby, and Ozpin would see it as a great setback in the fight against evil.