FireGraySilver

FireGraySilver is the poly ship between Firestar, Graystripe and Silverstream from the Warriors fandom.

Canon
Silverstream rescues Graystripe when he accidentally falls into the river, and the two start meeting in secret, having fallen in love. Aftarwards, Fireheart sneaks out of camp to check on Silverstream in secret. During a battle, Fireheart refuses to attack Silverstream, causing Tigerclaw to suspect he is a traitor. Despite Mistyfoot and Fireheart pressuring them to stop meeting, they are soon expecting kits, and Silverstream is confident that the kits will be accepted as her father is Clan leader. However, the kits come early, and Silverstream doesn't survive. RiverClan demands ThunderClan give them the kits, and Graystripe prevents a battle by allowing this, but he joins RiverClan to help raise them. Moons later, Silverstream appears in StarClan, giving Firestar one of his nine lives, the gift of loyalty and to know what is right.

Firestar becomes leader and wishes to appoint Graystripe as his deputy, but decides against it as due to Graystripe's disloyalty, appointing Whitestorm instead. He proves his loyalty to ThunderClan after he saw Darkstripe feed Sorrelkit deathberries, attacking his half-brother. During the battle with BloodClan, Whitestorm is killed by Bone, and chooses Graystripe to succeed him. Graystripe leads an attack on the construction Twolegs alongside Squirrelpaw to free the trapped cats, including Squirrelpaw's sister, Leafpaw, other Clan cats, and two non-Clan cats, Sasha and Cody. He manages to help open several cages before being snatched up by the Twolegs and being taken away. After being told of his capture, Firestar grieves heavily for the loss of his friend, refusing to believe he is dead. Firestar does not appoint a new deputy for many moons; much to the dismay of his Clanmates and the other Clans, though eventually a sign by StarClan is sent to Leafpool, and a vigil is held for Graystripe. Brambleclaw is chosen to succeed his position, despite not yet receiving an apprentice.

Firestar continues to lead ThunderClan and makes his grandchildren, Hollypaw, Jaypaw, and Lionpaw, into apprentices. Graystripe finds his way back to the Clans, and Firestar ultimately decides to keep Brambleclaw as his deputy. Two cats from the Tribe of Rushing Water come for Stormfur and Brook, and he releases them once he hears why they need help. He sends Brambleclaw and Squirrelflight along with them, along with Hollypaw, Lionpaw, and Jaypaw. Jaypaw tells Lionpaw and Hollypaw of a prophecy involving them.

When he dies, Firestar continues to watch over the forest from StarClan, and delivers a message to the Clans' medicine cats. It tells them that they must embrace what they find in the shadows. He sends a vision to Alderpaw, which leads to the medicine cat apprentice going on a journey to find SkyClan with Sandstorm, following the same route Firestar and his mate took several seasons ago. He continues to appear in dreams to medicine cat, and guides Leafpool to realize they need to drive the Kin out of Clan territory, and find SkyClan. Firestar meets with other Clan leaders in StarClan to discuss the coming darkness, and how they can help the cats by the lake.

Much later, in the super editions, Graystripe helps to assist his clan in surviving after the lake floods. He offers advice to ThunderClan's new leader, Bramblestar. Later, Graystripe feels his age catching up to him, and he retires to the elders den. While there, he speaks highly of his kits, including he and Silverstream's kits. Later, when Squirrelflight is struggling, he promises to help advise her, but when a few cats go out wandering, he decides to join them He and Flipclaw go to the mountains, where they find Stormfur, one of Graystripe and Silverstream's kits.

Graystripe dies in the latest book, joining his best friend and mate in StarClan.

Fanon
FireGraySilver is an extremely unpopular poly ship, barely getting any fanart or fanfiction, unless you look really hard. There may be some minor mentions of the ship in fan videos, but nothing too much. Any that may be out there are extremely hard to locate. The minority that does ship it really like drawing fanart of it, some of which are comedic/memey. Most of this ship's art can be located with a simple google search of "firestar graystripe silverstream". Sadly, the fanfictions aren't as easy to find as the art is.

Fandom
FAN FICTION
 * Firestar/Graystripe/Silverstream tag on FanFiction.net

Trivia

 * The trio was formed during The Prophecies Begin arc, more specifically in Book 2: Fire And Ice.