A lot of fanfics also explore the idea of them facing challenges together, whether it's against the Empire or some other dark force. Their different powers and abilities often play a role in these stories, like Cal's connection to the Force and Merrin's Nightsister magic.
Well, Reddit can be a great place too. There are subreddits dedicated to Star Wars fanfiction where people might recommend Cal Kestis and Merrin fanfics. You can post a request asking for good ones, and the community will likely respond with some great suggestions. Additionally, Tumblr sometimes has fanfic writers sharing their works or reblogging others' stories about these two characters.
Often their relationship is portrayed as a deep and growing bond. They start as comrades and gradually develop feelings for each other. Their different abilities, Cal's Jedi training and Merrin's Nightsister magic, bring them together as they face challenges.
The 'hurt/comfort' trope is quite common too. Maybe Cal gets injured during a battle, and Merrin has to take care of him, which deepens their relationship. Also, the 'soulmate' trope can be found in some fanfics, suggesting that they are meant to be together on a deeper, almost spiritual level, which ties in well with the Star Wars universe's themes of destiny and the Force.
A really interesting fanfiction is the one where Cal and Merrin find themselves in a situation where they have to protect a group of refugees. This story shows their selfless nature. Cal uses his lightsaber skills and Merrin her unique powers to fend off the attackers. It's a great exploration of their relationship as they work side by side to achieve a common goal.
You can start by looking on fanfic platforms like Archive of Our Own (AO3). It has a large collection of Star Wars fanfics, including those featuring Cal Kestis and Merrin. Just search for their names in the search bar, and you'll be presented with a variety of stories with different themes and ratings.
One great 'Star Wars Cal Kestis Fanfiction' is 'Cal's Journey Beyond'. It explores Cal's further adventures after the events of the game. It has him facing new Sith threats and forming unexpected alliances. The story really delves into his character growth and his struggle with the Force.
Surviving Order 66 is a key element. It's what sets the whole story in motion as he has to go into hiding. Another is his time on Bracca, working in the scrapyard while hiding his Force - sensitive nature.
Cal Kestis' origin starts with being a young Jedi in training. When Order 66 was executed, he narrowly escaped death. He had to live in hiding on Bracca. He was just an ordinary worker there, but his past as a Jedi was always there beneath the surface. His origin story is also about his connection to the Force. It was this connection that ultimately led to his discovery and his decision to oppose the Empire, as the Force within him was too strong to be suppressed forever.