Another theme is family. Many fanfictions explore the male Cousland's relationship with his family, how his family name influences his actions and decisions. It could be about protecting his family's legacy or living up to their expectations.
Adventure and Heroism. Since they are characters in a game world full of quests and battles, many fanfictions incorporate their adventures together. They fight side by side against dark forces, which also strengthens their bond.
The theme of discovery is quite common too. As they travel together, they discover new places, new magic, and new aspects of themselves. It's really interesting to see how the authors play with these themes and how they make the relationship between Cousland and Leliana evolve within the context of these themes in the Dragon Age setting.
Romance can also be a big theme. Writers might explore the relationship between cousland and teagan, how they fall in love, and the challenges they face in their relationship, like differences in social status or family expectations.
A common theme is adventure. The Cousland character often goes on adventures involving the Griffin, exploring new lands or facing dangerous foes.
A common theme is the exploration of their relationship's development. Given their different backgrounds in the Dragon Age universe, how they come to understand and care for each other is often explored.
In many such fanfictions, if Cousland was betrayed, it could lead to a dark and complex storyline. Alistair might be conflicted. Maybe he was forced into a situation where he unknowingly played a part in the betrayal. The story could explore Cousland's struggle to survive and seek revenge. Their relationship, which might have been one of friendship or more, would be shattered, and both characters would have to face the consequences of this new, tumultuous situation.
There's also 'Male Cousland in the Time of Strife'. This fanfiction places the male Cousland in a difficult situation and shows how he navigates through political intrigue and battles. It has detailed descriptions of the settings and the character's internal struggles, which make it a great piece of fanfiction.
The contrast between their characters is one reason. Cousland, often noble and with a sense of honor, and Morrigan, who is more of a wild and mysterious figure. Their interactions can create really interesting storylines.
You can start by looking on popular fanfiction platforms like Archive of Our Own (AO3). Just use the search terms'male Cousland' and 'Zevran' in the search bar, and it should bring up relevant slash fanfictions. Another option could be FanFiction.net, though AO3 generally has a more extensive collection of such niche works.
One possible plot twist could be that Cousland was actually faking the betrayal for a greater good. They might be trying to infiltrate an enemy group that was targeting Alistair. Another could be that the real betrayer was someone close to Alistair who framed Cousland. It could also be that Cousland was betrayed due to a prophecy that was misinterpreted, and later Alistair discovers the truth and has to fight against the forces that set up Cousland.