There's also 'Teela's Discovery'. In this fanfiction, Teela uncovers a long - lost secret about He - Man that changes their dynamic. It's an interesting read as it shows a different side of their friendship and how they handle this new knowledge.
You can start by looking on fanfiction websites like Archive of Our Own (AO3). It has a large collection of fan - created works, and you can search specifically for He - Man and Teela fanfiction there. Another option is FanFiction.net, which has been around for a long time and has a lot of content related to various fandoms, including He - Man.
Some fanfictions explore what would happen if Teela got a special power boost. In this scenario, He - Man might have to adjust to her new - found abilities and they could have a role reversal of sorts, with Teela taking the lead in some battles while He - Man supports her from the side.
A common theme is friendship. Their bond is often explored, like how they support each other through various challenges in different stories. For example, in many fanfics, when one is in danger, the other will go to great lengths to save them.
Another way is by exploring their pasts. Maybe there are events in Teela's childhood that she has never shared with He - Man or Man - At - Arms. As she reveals these, it can bring them closer. Similarly, if Man - At - Arms tells stories of his early days in the service, it can give He - Man and Teela new insights into his character, and strengthen their relationships. They could also have a joint training session where they learn more about each other's fighting styles and weaknesses, which would enhance their teamwork and personal relationships.
A plot could revolve around a parallel universe where He - Man isn't the hero he is in the regular Eternia. In this universe, he and Teela meet in a more ordinary way, like in a small village. They fall in love without the weight of their usual heroic responsibilities. But then something threatens to pull them apart, and they have to find a way to be together, which eventually leads them to discover a way to merge this parallel universe with their own.
One plot idea could be a time - travel adventure. He - Man, Teela and Man - At - Arms get sent back in time to Eternia's early days. They have to figure out how to get back while also dealing with the primitive versions of the villains they know. Another could be a story where Teela is cursed and He - Man and Man - At - Arms must find a way to break the curse, exploring different magical realms in the process.
It can start with small moments of realization. For example, He - Man notices how Teela is always there for him during battles, not just as a comrade but someone special. He begins to see her in a new light. Teela, on the other hand, could start to admire He - Man's inner strength as well as his physical power.
In certain fanfiction scenarios, Teela's discovery could lead to a whole new adventure. She might decide to help Adam keep his identity a secret more effectively. Or perhaps she wants to train with him, knowing he has the power of He - Man. Their relationship could shift from a simple friendship or comradeship to something more complex, with her having newfound respect for him and a deeper understanding of his responsibilities.
Well, a great place to start looking for He - Man and Thundercats fanfiction is Archive of Our Own (AO3). It has a large collection. Some fanfictions in there might explore the backstories of the characters in new and interesting ways. For example, how a character from He - Man would react if they were suddenly thrust into the world of Thundercats, or vice versa.
In other cases, Teela's reaction could be a mix of emotions. She could be happy that Adam is such a powerful hero but also a bit sad that he felt the need to keep it a secret from her. This discovery might make her question their entire relationship up to that point, and she may need time to sort out her feelings about it all.