Allison remains alive throughout the Umbrella Academy comics. The creators chose to keep her as an active character, contributing to the overall plot and developments.
In a Luther and Allison fanfiction, there could be a lot of emotional moments. For example, they might have to face their past traumas together. Since they are siblings in the Umbrella Academy, the fanfiction could explore a deeper bond that goes beyond the typical sibling relationship, like they rely on each other more than ever to deal with the chaos of their lives.
One potential theme could be family. Despite their complex relationship as siblings in the Umbrella Academy, the fanfiction could focus on how they strengthen their family bond. Another theme could be self - discovery. They both have unique powers and personalities, and the fanfiction could explore how they learn more about themselves through their interactions.
One interesting plot could be where Vanya and Allison have to team up to face a new threat that the official story didn't cover. Maybe a time - traveling villain who is trying to change the past in a way that would be disastrous for their family. They would have to put aside their differences and use their unique powers together to stop this threat.
Allison is also a popular character to write well. Her power of rumor - spreading and how it has affected her relationships can be explored in great detail. Writers can show her growth from someone who misused her power to someone who uses it more responsibly, especially in relation to Vanya.
Well, Allison's power of rumor - spreading can be used to enhance Luther's physical strength. For example, she could spread a rumor that Luther is invincible, which might give him an extra boost of confidence and make his strength even more effective in a fight. Or she could use her power to create a distraction while Luther uses his strength to take down an enemy directly.
A lot of fanfictions might explore the romantic aspect between Luther and Allison. In some, they might start off as just friends but gradually realize they have deeper feelings. For instance, they could be at a family gathering and have a moment where they look at each other differently. There could also be fanfictions where they are forced to pretend to be a couple for a mission, but then the lines between pretense and reality start to blur. And then there are those fanfictions that look at how their powers interact in relation to their relationship. For example, Allison's power of suggestion could play an interesting role in how she and Luther communicate and understand each other in the story.
One interesting plotline could be Allison and Luther trying to reconnect after years of being apart due to the chaos in their lives. They might start by sharing memories of their childhood in the Academy that they had long forgotten. For example, they could recall a particular training session where they had to rely on each other to complete a difficult task. Another plotline could involve them facing a new threat together and having to use their unique abilities in harmony. Allison's power of rumor manipulation and Luther's super strength could combine in unexpected ways to defeat the enemy.