Brambleclaw

One of StarClan's chosen cats to lead the Clans to their new territories, and eventual deputy of ThunderClan.

Brambleclaw's point of view exists in three of the six The New Prophecy books: Midnight, Starlight, and Sunset. As deputy of ThunderClan and the (fake) father of the three protagonists in the Power of Three series, he remains a main character even after we have lost his viewpoint.

Much of Brambleclaw's character arc surrounds him being the son of Tigerstar, aka the greatest evil the forest has ever known. It doesn't help that he's apparently his spitting image, and that he shares similar ambitions in becoming Clan leader. He looks so much like him, in fact, that our protagonist Firestar spends a lot of the first series judging him prematurely because he expects he will turn out like his father. And for a while, Brambleclaw is tempted over to the dark side and secretly conspires in the Place of No Stars (aka Cat Hell) with Tigerstar and equally evil half-brother Hawkfrost to achieve his goal of becoming deputy. His weird obsession with Hawkfrost leads to ruptures in his relationship with Squirrelflight, who is Firestar's daughter, aka his dad's greatest enemy. Nice.

He ultimately is forced to kill Hawkfrost in order to save his Clan leader's life, and permanently aligns himself with the good guys. Now that that drama is out of the way, life is pretty pleasant: he's a devoted father to his three kits, has a loving mate in Squirrelflight, and enjoys bossing everyone around as Clan deputy, because he is just a very bossy cat in general. Until he finds out that Squirrelflight was lying to him all along and the kits are not really theirs at all, which comes as a rather nasty blow and ends their relationship for a while. Eventually, though, these two work out their issues and get back together, because they are a match made in StarClan (aka Cat Heaven).

I'm perfectly aware that his name should be Bramblestar according to current books, but as I don't like the current books very much, in my mind he will always be Brambleclaw.