Archive of Our Own (AO3) is also a wonderful option. It has a very active Star Trek fanfiction community. The tagging system is really helpful. You can search for 'Sela' and also filter by other criteria like the type of story (romance, adventure etc.) or the rating of the story.
FanFiction.net is a great platform. It has a large collection of Star Trek fanfictions, and you're likely to find some good ones about Sela there. It has a search function that allows you to easily look for stories specifically related to her.
There might be a fanfiction where Sela has to team up with the Star Trek crew against a common enemy. This would be really cool as it would put her in a situation where she has to work with those she usually opposes. She could bring her Romulan tactics and knowledge to the table, and in the process, there could be some interesting character development for her and the crew members.
One great mccoy star trek fanfiction is 'The Doctor's Dilemma'. It delves deep into McCoy's character, exploring his relationships within the Star Trek universe in a really engaging way.
Well, there's 'Eternal Alliance'. This fanfiction is interesting because it takes the characters of Star Trek Chulu and puts them in a unique situation where they have to form an alliance that was unexpected. Also, 'Fateful Encounter' is a good read. It starts with a chance encounter between them and then unfolds into a story full of action and emotion. Then there's 'Shared Destiny' which is about how their destinies become intertwined in a rather complex way.
There is a 'naruto and star trek fanfiction' that focuses on the concept of Naruto's chakra being similar to the energy sources in the Star Trek universe. This leads to some really cool crossovers in terms of how the characters interact and how they might use each other's powers and technology. For example, Naruto's ability to sense chakra could be used to detect hidden threats in the Starship.
There's also 'Indomitable: A New Beginning'. This fanfic focuses on the backstories of some of the lesser - known crew members and how they contribute to the overall mission of the Indomitable. It really delves deep into the Star Trek universe and its values.
There's a 'ben 10 star trek fanfiction' that delves into what would happen if the technology of the Omnitrix was studied by the Star Trek scientific minds. It's really interesting as it combines the two different scientific concepts from both universes. They might try to reverse - engineer it or find a way to use it for peaceful exploration, which is in line with the Star Trek values.
Some fanfictions might center around Chekov's skills and how they develop over time. He was known for his technical expertise. So, there could be stories where he invents new things to help the Enterprise. Also, there are crossovers with other science - fiction universes. For instance, a crossover with the Doctor Who universe where Chekov meets the Doctor and they have to solve a problem together. These crossovers can be really interesting and add a new dimension to the character of Chekov.
There's also 'NSYNC in the Delta Quadrant'. In this fanfiction, the members of NSYNC find themselves on a Voyager - like adventure in the Star Trek universe. They use their musical talents in unexpected ways to communicate with alien species and make their way through various challenges.
One great vampire Star Trek fanfiction is 'The Vampire's Voyage in the Star Trek Universe'. It combines the allure of vampires with the adventure of Star Trek really well. The main character, a vampire, finds himself on a Starfleet ship and has to deal with both his vampiric nature and the challenges of space exploration.
Sure. 'A Captain's Heart' is a great one. It beautifully weaves a romantic story between the captain and a new crew member. Another is 'Love Among the Stars' which focuses on a forbidden love between characters from different species in the Star Trek universe.