"Fire will save the Clan...you never understood, did you? Not even when I gave you your apprentice name, Firepaw. And I doubted it myself, when fire raged through our camp. Yet I see the truth now. Fireheart, you are the fire who will save ThunderClan. You will be a great leader. One of the greatest the forest has ever known. You will have the warmth of fire to protect your Clan and the fierceness of fire to defend it. You will be Firestar, the light of ThunderClan."
After Bluestar's death, he rose to leader as Firestar appointing Whitestorm as his second-in-command. He later passed the role to Graystripe upon the white deputy's death during the Battle against BloodClan. Firestar became mates with Sandstorm, and they went on a journey to rebuild SkyClan. They were successful, and upon their return, had two daughters together: Leafpool and Squirrelflight.
When Twolegs destroyed the forest, he led his Clan on the Great Journey and helped them settle into the lake territories. Firestar appointed Brambleclaw as deputy due to Graystripe's disappearance, and had him keep the role after his friend returned. Firestar fought in the Great Battle and lost his final life due to wounds. He continues to watch over the cats by the lake from StarClan, and guides medicine cats with the prophecies he gives.
Fireheart is given Cinderpaw as an apprentice, but the she-cat gets injured on the Thunderpath in one of Tigerclaw's schemes. He finishes Brackenpaw's training for Graystripe, as his friend is off seeing Silverstream. Fireheart is given his nephew Cloudpaw as an apprentice, and struggles to rein his flippancy towards the warrior code. Tigerclaw's treachery is revealed to the Clan during a foiled attack on ThunderClan's camp, and Fireheart is made deputy in wake of his banishment. He attempts to hold a fragile ThunderClan together as Bluestar's judgement falters, and seeks help from RiverClan when a fire ravages ThunderClan's camp.
Upon Bluestar's death, he ascends to leader as Firestar. He appoints Whitestorm as his deputy, and together they rebuild the Clan. He helps form the four Clans of the forest into LionClan, and together they are able to drive BloodClan from the forest, and disband TigerClan. Whitestorm dies during the battle, and he appoints Graystripe as ThunderClan's new deputy.
"Loyalty is what matters, and that exists now, not in the past. Loyalty has to be proved every day, in every piece of fresh-kill brought back for the Clan, every claw mark on our enemies, every patrol, every training session."
Firestar and his mateSandstorm have had two daughters, Squirrelpaw and Leafpaw. He becomes concerned when Cinderpelt reveals a prophecy concerning the kin of fire and tiger, along with danger. However, his attempts to keep Squirrelpaw and Brambleclaw apart because of it simply spur them further into leaving on a journey. Firestar, not knowing where they are, is devastated by the loss. Twolegmonsters begin to destroy the forest, and the leader struggles to keep his Clan well-fed.
Brambleclaw and Squirrelpaw return from their journey and bring the news that StarClan has a plan for them to move to a new home. While the other Clans are resistant, Firestar agrees they should go - when all four Clans travel together. After the destruction of ShadowClan's camp, the four Clans start the Great Journey. The Tribe of Rushing Water assists them over the mountains, and they make it to the lake territories. Firestar helps ThunderClan settle into their new territory, and supports Onewhisker during Mudclaw's rebellion.
Badgers attack ThunderClan's camp and heavily damage it, and the leader welcomes Stormfur and Brook when they wish to stay and help. ShadowClan tries to take advantage of ThunderClan's weakness and take territory, but are beaten off. Firestar accepts the loss of Graystripe and appoints Brambleclaw as deputy. Brambleclaw struggles on what to do when he is offered the chance to kill Firestar and take leadership for himself, but ultimately does his former mentor proud by saving his leader.
"Surely it is our struggle against hardship that makes us true warriors. You think fresh blood in the Clans will weaken us? A life without hardship will weaken us more."
—Firestar to Blackstar at the Gathering The Sight, page 335
Firestar continues to lead ThunderClan and makes his grandchildren, Hollypaw, Jaypaw, and Lionpaw, into apprentices. Graystripe finds his way back to the Clans, and the leader ultimately decides to keep Brambleclaw as 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.
Later, Firestar defends ThunderClan's borders, and devises a plan to keep WindClan from continuing to cross the border. He and a patrol cave in a tunnel the rival Clan's been using to trespass, and several fights across the forest soon ensue. A Great Battle ensnares all four Clans of the forest, and is only stopped by an eclipse of the sun. Greencough soon comes and leaves a large part of ThunderClan sick. Firestar has the ill cats move to the abandoned Twoleg nest to keep it contained, and while catmint is eventually found to cure it, he loses a life before that.
After the mystifying murder of Ashfur, he sends a patrol to track down Sol, believing him the killer. They find him and bring him to camp, but no evidence is found. However, once they return, Hollyleaf reveals at a Gathering her parents are Leafpool and Crowfeather. Firestar is shocked, but insists the Clan needs to stay strong despite this.
"He gave his life to save the thing that mattered most to him: his Clanmates. He truly has the power of the stars in his paws now. You will see him again, when it is time."
—Jayfeather to Dovewing after Firestar's death The Last Hope, page 324
Firestar loses a life to a fox attack, but soon recovers, which relieves his medicine cats. He sends Lionblaze and Dovepaw on the journey to the beaver dam, which succeeds and ends the lake's drought. Firestar experiments with new training methods, and encourages his Clanmates to learn tree-climbing. He welcomes Mistystar as RiverClan's new leader, after Leopardstar passes away. Firestar believes Ivypaw when she tells him of a dream where ShadowClan came to take ThunderClan's territory from them. After persuasion, he reclaims a stripe of land that he'd given away previously, and loses a life in the resulting conflict.
Ivypaw crosses the ShadowClan border, and is held captive in exchange for catmint. Firestar makes the trade, but is unhappy with how low the other Clan was willing to go. The leader tries out a new assessment technique, but the attempt ends in Icecloud getting injured. He gives Dovewing her warrior name for helping save her, while her sister Ivypool completes a normal assessment for her name. Firestar agrees to send Jayfeather, Dovewing and some other warriors to the Tribe of Rushing Water after the medicine cat is called there by dreams.
Upon their return, tensions begin to rise between the Clans. Onestar accuses Firestar of conspiring against WindClan, which he denies. Sol returns, and the leader allows him to stay, but is wary nonetheless. Hollyleaf returns, and Firestar welcomes her back into the Clan. Dovewing urgently informs him of their escape from the tunnels after hearing WindClan and Sol plotting an attack on ThunderClan. They prepare for the attack with advanced skills from Hollyleaf, and drive the rival Clan away. Hollyleaf admits to killing Ashfur, and decides not to punish her. He also accepts that Cinderheart wishes to become a medicine cat, after the discovery that she was a reincarnation of Cinderpelt.
After Dawnpelt accuses Jayfeather of killing Flametail, Firestar bans Jayfeather from attending more Gatherings. Tensions continue to rise within the Clans, since rogue scents are being found in every territory. Firestar is discovered to be the fourth cat in the Tribe of Endless Hunting's prophecy, and works together with Jayfeather, Lionblaze, and Dovewing to fortify the Clan for the upcoming confrontation with the Dark Forest. The Clans work together to drive out the evil cats, and fights Tigerstar. He succeeds in killing his longtime enemy, but succumbs to his wounds and joins StarClan.
Firestar continues to watch over the forest from StarClan, and delivers a message to the Clans' medicine cats 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.
This section summarizes Firestar's significant Super Editions appearances. If you're looking for a full list, find one here!
In Firestar's Quest, Firestar receives several dreams of fleeing cats in need of help. Bluestar tells him of SkyClan, the fifth Clan of the forest that was driven out long ago. He finds Smudge has had similar dreams, and has a vision of Cloudstar, the former leader of SkyClan. Firestar realizes that he must go on a journey to rebuild SkyClan, and takes Sandstorm with him to find where they went after leaving the forest. Once they arrive, they find Skywatcher, the last upholder of SkyClan's traditions.
The pair of ThunderClan cats gather the descendants of SkyClan cats from the area with Cherrypaw and Sparrowpaw's help, along with any other cat interested. They find Echo in the Twolegplace, a kittypet who's been having many dreams of strange things. She joins SkyClan, and becomes a medicine cat with the name Echosong. Firestar and Sandstorm help the new Clan in a battle against rats threatening the territory, and he loses a life. Per StarClan's will, Leafstar is made leader of the new SkyClan, with Sharpclaw as her deputy. Firestar and Sandstorm return to ThunderClan and have two kits together: Squirrelkit and Leafkit.
In Bramblestar's Storm, Firestar settles into life in StarClan. He passes on a prophecy to Bramblestar: when water meets blood, blood will rise. Cats within ThunderClan still grieve the loss of their former leader, and Bramblestar struggles to come into his own as a leader. Firestar meets with his former apprentice in dreams to encourage him onwards. During a Gathering, he appears with many of the other cats who died in the Great Battle, showing that they are still watching over the Clans.
The newcomer has lost his Twoleg collar in a battle for his honor. StarClan has spoken its approval - this cat has been released from the hold of his Twoleg owners, and is free to join ThunderClan as an apprentice.
You look like a brand of fire in the sunlight. From this day forward, until he has earned his warrior name, this apprentice will be called Firepaw, in honor of his flame-colored coat.
I, Bluestar, leader of ThunderClan, call upon my warrior ancestors to look down on these two apprentices. They have trained hard to understand the ways of your noble code, and I commend them to you as warriors in their turn. Firepaw, Graypaw, do you promise to uphold the warrior code and to protect and defend this Clan, even at the cost of your lives?
Firepaw and Graypaw:
Then by the powers of StarClan I give you your warrior names: Graypaw, from this moment you will be known as Graystripe. StarClan honors your bravery and strength, and we welcome you as a full warrior of ThunderClan. Firepaw, from this moment you will be called Fireheart. StarClan honors your bravery and your strength, and we welcome you as a full warrior of ThunderClan. Fireheart, I am proud to have you as my warrior. Serve your Clan well, young one.
Welcome, Fireheart. Are you ready to receive your nine lives?
Yes. I'm ready.
With this life I give you courage. Use it well in defense of your Clan.
With this life I give you justice. Use it well as you judge the actions of others. Thank you. You revealed the truth when no one else could.
With this life I give you loyalty to what you know to be right. Use it well to guide your Clan in times of trouble.
With this life I give you tireless energy. Use it well to carry out the duties of a leader.
With this life, I give you protection. Use it well to care for your Clan as a mother cares for her kits.
With this life I give you mentoring. Use it well to train the young cats of your Clan.
With this life I give you compassion. Use it well for the elders of your Clan, and the sick, and all those weaker than yourself.
With this life I give you love. Use it well, for all the cats in your care - and especially for Sandstorm.
Welcome, Fireheart, my apprentice, my warrior, and my deputy. I always knew you would make a great leader one day. With this life I give you nobility and certainty and faith. Use it well as you lead your Clan in the ways of StarClan and the warrior code. I hail you by your new name, Firestar. Your old life is no more. You have now received the nine lives of a leader, and StarClan grants you the guardianship of ThunderClan. Defend it well; care for young and old; honor your ancestors and the traditions of the warrior code; live each life with pride and dignity.