One possible plotline could be that Ruby's death shatters her team. Weiss might become overly consumed with vengeance, leading her to make hasty and dangerous decisions. Blake could retreat into herself, feeling like she failed to protect Ruby. Yang might struggle with survivor's guilt and question her own strength. Another plotline could involve Ruby's sacrifice being the key to saving Remnant. Her death could inspire the remaining characters to come together in a way they never had before, uniting the kingdoms against a common enemy like Salem.
A plotline could be that Ruby's death is part of a dark prophecy. Her passing could be the catalyst for a new era of chaos in Remnant. Her friends initially despair, but then they start to notice strange occurrences. It turns out that Ruby's death has some unforeseen consequences on the Grimm or on the balance of magic in Remnant. The fanfiction could explore how the world changes without Ruby and how her friends either adapt to the new reality or find a way to bring her back, perhaps through some dangerous and untested magic.
One possible plotline could be that Ruby sacrifices herself to save her friends from an overwhelming enemy. In the heat of battle, she realizes that only by giving up her own life can she ensure the safety of her team. Another could be that she is poisoned by a new and deadly Grimm toxin that slowly weakens her until she passes away, leaving her friends to avenge her.
One possible plotline could be that Ruby is kidnapped by a powerful new enemy. This enemy might be after her silver eyes power and plans to use it for some evil scheme. Another could be that Ruby accidentally gets transported to another dimension during a battle, leaving her team to search for her.
Perhaps Salem starts to change her ways because of her love for Ruby. She might begin to question her long - held beliefs and actions, which could lead to a lot of drama and conflict within the story. For example, her followers might not understand her new attitude.
One possible plotline could be Ruby learning combat skills directly from Qrow. Since Qrow is a skilled Huntsman, he could teach Ruby unique fighting techniques that she might not have learned otherwise. For example, Qrow could show her how to use her scythe in more unconventional ways, taking advantage of her small stature and speed.
One plotline could be Ruby's death leading to a power vacuum. Since she's a powerful and important figure in the RWBY world, her death could cause chaos. Her friends might struggle to fill the void she leaves, both in terms of leadership and combat ability. For instance, they might have to quickly learn to work without her Crescent Rose and her strategic mind.
Well, a possible plotline could start with Ruby being somehow infected or cursed to become a Grimm. She would then experience a whole new set of emotions and abilities. Maybe she starts to have visions or dreams related to the Grimm's origin or their purpose. As she tries to understand what has happened to her, she might be ostracized by some of her friends who are afraid of her new form. However, a few might believe in her and help her. She could then try to use her new Grimm - like abilities, such as enhanced strength or stealth, to fight against a greater evil that is threatening both the Grimm and the people of Remnant. Along the way, she could learn more about the true nature of the Grimm and find a way to either reverse her condition or fully embrace it in a way that benefits everyone.
One possible fanfiction could involve Ruby sacrificing herself to save her friends from a powerful enemy. In this scenario, she might use her silver eyes one last time to hold off a horde of Grimm while her friends escape. Her death would be a tragic yet heroic moment, leaving her friends to carry on her legacy and the fight against evil in Remnant.
It could also be that Qrow's death is related to his own self - destructive tendencies. His alcoholism and the constant negative effects of his semblance on his psyche might lead him to make a rash decision. For instance, he might feel that he's a burden to his team or family because of his semblance always attracting bad luck. So, he decides to go on a solo mission against impossible odds, fully expecting not to come back alive.
One possible plotline could be a mystery. Ruby and Reese Lemon find themselves in the middle of a strange mystery in Vale. Strange things are happening, and they have to work together to solve it. Ruby's combat skills and Reese Lemon's unique perspective or abilities would be crucial in uncovering clues and finding the truth behind the mystery.
One possible plotline could be that Ruby discovers her hidden princess heritage and has to balance her normal Huntsman duties with the newfound responsibilities of royalty. Maybe she has to attend grand balls and diplomatic meetings while still trying to fight Grimm. Another could be that she has a secret princess identity that she uses to infiltrate an enemy kingdom or group, using her charm and skills as Ruby as well as her new royal persona.