LongFire

LongFire is the slash ship between Longtail and Firestar from the Warriors fandom.

Canon
When Firestar was a kittypet named Rusty, Longtail wanted him to prove his worth to ThunderClan. Rusty managed to tatter Longtail's ear. This angers him, and he slashes Rusty's collar off. Eventually, he begins to respect Fireheart, and realize that he is part of the clan now.

Later, Longtail becomes blind, and is now an elder. The clans are about to partake in The Great Journey. Longtail originally wanted to stay behind with the other elders, Speckletail and Frostfur. However, Firestar manages to convince him to come along.

Later, Longtail becomes the mentor to an apprentice named Sootpaw. However, he got blinded by an aggressive rabbit that scratched him in the eyes. This causes him to retire to the elder's den early, and to fall into a depression. Sootpaw is given Thornclaw as a replacement mentor. Firestar comforts Longtail, reassuring him and telling him that he'll always have a place in ThunderClan.

Fanon
LongFire is a somewhat-unpopular ship within the Warriors fandom. It's not often shipped because most people see them as enemies, or just as friends. However, people who do ship LongFire enjoy making little stories or alternate universes about them becoming mates and caring for each other. They portray Longtail and Firestar's relationship as sweet, two strangers who were eventually pulled together. LongFire shippers are quite art-oriented, and enjoy making art for this ship. Fanfics are a lot more uncommon, so it's harder to find those. All in all, LongFire, although unpopular, has lots of nice art up for show.

Fandom
FAN FICTION
 * Longtail/Firestar tag on FanFiction.net