Mercykill

Mercykill is the het ship between Mercy and Reaper from the Overwatch fandom.

Canon
They were both in Overwatch before it was disbanded, but have not been shown to have any significant interaction. The two would have interacted less during their time at Overwatch together. This is due to Mercy being the doctor for the main Overwatch team, while Reyes was the leader of Blackwatch, and would have been going to their doctor, Moira.

Although there aren't many interactions between them, their shared dialogue seems to support that something happened between the two. Specifically involved with Reyes' powers.

Fanon
The pairing is more common among Overwatch fans. Many ship the two based on their opposing personalities and positions. There's also ship support from their shared dialogue, which many expand upon in fic and art. Many will also depict Mercy as being a light in Reyes' life, given the dark path that he's gone down.

A less common concept is Mercy reacting to Reyes being alive and becoming Reaper. Fans tend to focus on the reactions of the Blackwatch team, but shippers will focus on Mercy's reaction. Mercy's reaction is dependent on the creator, but most will depict her as conflicted.

Like all Overwatch pairings, many fans draw the two together in their variant skins. One that is used together more often are their Halloweenskins. This is most likely due to their characters in Junkenstein's Revenge, are on the side of Junkenstein. It's also due to the Halloween skins being more in contrast to Mercy's normal characterization. She is more mischievous and less moral, which works well with Reaper's current status.

On AO3 it is the third most written ship for Reaper and the fifth most written ship for Mercy.

Fandom
FAN FICTION

TUMBLR

Trivia

 * Mercy is 37 while Reaper's age is unknown

Variations

 * MercyKill76 refers to the ship between the two and Soldier: 76