Anam Cara (слэш)

“There is, apparently, an angel with a soulmate.”
Crowley’s expression was one of poorly-veiled amusement. “Uh oh. Reckon your lot weren’t too happy ‘bout that. Soulmates are supposed to be strictly for mortals, aren’t they?”
“Crowley.” Aziraphale’s voice was just on the side of testy. “The angel’s soulmate is a demon.”
Crowley’s face morphed from hilarity to understanding and finally to horror in a matter of seconds. “Oh,” he said. His eyes met Aziraphale’s from behind his designer sunglasses. “Oh."