One common theme is the healing of emotional wounds. Hanzo has a lot of past traumas, and Mercy, with her kind and nurturing nature, can be depicted as helping him overcome those. For example, she might help him come to terms with his actions in the Shimada clan.
Friendship - turned - love is also quite common. They begin as comrades or reluctant allies and as they spend more time together, their relationship deepens into something more romantic. This progression is seen in a lot of 'hanzo x mcree fanfiction' as it adds an interesting dynamic to their characters.
One common theme is the clash of their cultures. Hanzo is from a very different cultural background compared to Sonya. Their different values and ways of life often create interesting dynamics in the stories.
One common theme is redemption. Hanzo, who has a lot of guilt for what he did to Genji in the past, often goes through a journey of redemption in these fanfictions. Another theme is family reconciliation, as they are brothers.
One common theme is redemption. McCree and Hanzo both have complex pasts, and many fanfictions explore how they find redemption through their relationship. Another theme is trust. Since they come from different backgrounds in the Overwatch world, building trust is a big part of their stories.
One common theme is mentorship. Hanzo, with his vast experience, could be seen as a mentor to Jacqui in some fanfictions. For example, he might teach her some special fighting techniques.
A common theme is friendship. They are both characters from Overwatch and many fanfictions explore how they become friends, sharing their hopes and dreams. For example, they might talk about their different reasons for being part of Overwatch while having a cup of coffee in the base.
Protection is also a major theme. McCree feels the need to protect Mercy from the dangers of the world they live in, while Mercy protects McCree in her own way, by healing his physical and sometimes emotional wounds.
A theme of mutual understanding also pops up a lot. Given their different personalities and roles in Overwatch, they have to understand each other's perspectives. For example, Mercy's more calm and scientific approach compared to Tracer's more impulsive and action - oriented style. Their fanfictions often explore how they bridge these differences.
Love and mutual understanding are also quite common. The OC might initially be misunderstood by Mercy or vice versa, but as the story progresses, they come to understand each other deeply. And of course, the theme of self - discovery. The OC may discover new aspects of themselves through their interactions with Mercy, like finding a new purpose in life.
Another theme is the power dynamic. Reaper has his dark and powerful abilities, while Mercy is a healer. Fanfictions often play with how these two different power sets interact, whether it's Reaper protecting Mercy in his own way or Mercy using her healing to save Reaper from his self - destructive tendencies.