The first series is from Fireheart's point of view, but the second, third, and fourth series are from younger cats' point of view (though we still do see Fireheart since he's still a ThunderClan cat).
Firepaw becomes fireheart in into the wild and later in the darkest hour he receives his leader name firestar (after Bluestar dies).
Firekit's warrior name was Fireheart.
Fireheart
GRAYstripe fell in the river trying to save those drowning kits with fireheart.
After he becomes leader Firestar has lead Thunderclan in all the books so far. It is suspected he dies in the last Omen in the Stars book though.
Rusty, or Firepaw's, warrior name is Fireheart.
Firepaw Fireheart or Firestar
Fireheart could not trust Tigerstar in the Warriors series. Tigerstar was ambitious and power-hungry, ultimately leading to betrayal and deceit. Fireheart had to be cautious around Tigerstar due to his deceitful nature and willingness to do whatever it took to achieve his goals.
yes, he is. But now he is a Warrior, his name is now Fireheart.
Fireheart's sister Princess, offered one of her kits to him so that it could train to become a warrior. Fireheart ended up bringing Cloudkit (Later Cloudtail) into the clan :)
Yes, in the last hope.
Squirrelkit (later Squirrelflight) Warrior Leafkit (Later Leafpool) Medicine cat