Firestar

The main character of the first series, and leader of ThunderClan. A large part of his identity revolves around his flame-colored pelt. The first arc also describes him as handsome, but I guess he loses his looks as time goes on, because that detail gets dropped.

Firestar is pretty much the hero of the main series. He's a natural leader, skilled in battle, and saves the Clans multiple times. It is he who uncovers Tigerstar's treachery and leads the Clans to victory against BloodClan when they attempt to take over the forest. He's also the subject of the prophecy "Fire alone can save our Clan." For this reason, the other Clans are all secretly very jealous of Firestar. They feel inferior, so in later series, they poke fun at him at every chance they get for having been a kittypet and trying to make peace all the time.

This criticism isn't entirely unwarranted, however, as Firestar has a habit of breaking the warrior code by taking in outsiders and interfering in WindClan's business. He has a reputation as a bleeding heart, and firmly believes that loyalty is what matters as opposed to where a cat is born.

You see, Firestar was born a kittypet, typically regarded as soft, weak, and stupid by Clan cats. This racism goes pretty much unchallenged by everybody throughout the series; it is a generally accepted aspect of Clan life, and thus Firestar has to overcome a lot of prejudice before he earns his place in ThunderClan.

Though we lose his viewpoint after the first six books (excluding Firestar's Quest), he remains more or less a major character as the series continues.