Family dynamics is a huge theme. Given that the Umbrella Academy is all about a dysfunctional family of superheroes, fanfics often expand on this. They might show how the siblings deal with their past traumas together or how they try to become a more functional family unit. It can be really heart - warming or heart - breaking depending on the story.
A really interesting fanfic is 'Time - Twisted Umbrella'. In this one, the timeline gets all jumbled up, and the characters have to figure out how to fix it while also dealing with their own personal issues. It's a unique take on the whole concept of the Umbrella Academy and its connection to the Marvel universe.
One common theme is time - travel. Since the show has elements of time - travel, many fanfictions explore it further. Another is the relationships between the siblings, like their reconciliations or new conflicts.
You can start by looking on Archive of Our Own (AO3). It has a vast collection of 'Umbrella Academy' fanfictions, including many focused on Five. The site has a great search function that allows you to filter by character, genre, and more.
There's also a fanfic called 'Five and the Mysterious Portal'. This one combines Five's ability to jump through time and space with a new, mysterious element that adds a whole new layer of intrigue to his story. It's full of action and unexpected twists that keep you hooked from start to finish.
One great Klaus 'Umbrella Academy' fanfiction is 'The Ghostly Encounters of Klaus'. It delves deeper into Klaus's relationship with the spirits he can see and communicate with. It adds more emotional depth to his character.
One great 'Umbrella Academy Luther Fanfiction' is 'Luther's Redemption'. It delves deep into Luther's character, exploring his insecurities and his journey towards self - acceptance outside of his superhero identity. The story has well - written dialogues that really bring out the essence of Luther's complex personality.
There's also a fanfic called 'Klaus and the Mysterious Artifact'. In this story, Klaus stumbles upon an ancient artifact that seems to have a strange connection to his family's past. It's full of adventure and mystery, and the author does a great job of writing Klaus' character as both humorous and complex.