Kurocina

Dark Pitcina is the het ship between Dark Pit from the Kid Icarus fandom and Lucina from the Fire Emblem fandom.

Canon
Dark Pit and Lucina have met in the Super Smash Bros. series. In Ultimate, they are both designated as "Echo Fighters" and are the only veterans to do so.

Fanon
Most people ship Dark Pit and Lucina on account of them being clones/Echoes. Dark Pit is often depicted as the tsundere type, appearing grouchy but having a soft spot for Lucina.

Fandom
TUMBLR
 * Kurocina on Tumblr

FAN FICTION
 * Dark Pit/Lucina on Fanfiction.net
 * Dark Pit/Lucina on Archive of Our Own

Trivia

 * The name "Kurocina" comes from Kuro, the Japanese word for "black". Kerosene is a slight corruption/pun on Kurocina.