Lerry

"Leon's not just anyone. He saved my life back in Raccoon City."

- Sherry to Jake Muller, Resident Evil 6.

Lerry is the het ship between Leon Kennedy and Sherry Birkin from the Resident Evil fandom.

Canon
Resident Evil 2

Leon and Sherry met in 1998 during the Raccoon City outbreak. Sherry was 12 years old, and Leon was 21 and a police officer. As Sherry was a merely a child in a highly dangerous situation, Leon (and Claire Redfield) took it upon themselves to protect Sherry.

Fanon
After the release of Resident Evil 6, when Sherry is seen in-game again, she is an adult woman. That's when people began to ship them romantically, though only by a handful of people. Leon and Sherry's relationship could be augured as a "father/daughter" type or simply as a friendship, as they are in canon.