Jayfeather

Blind medicine cat of ThunderClan, and also one of the three cats involved in the prophecy "There will be three, kin of your kin, who hold the power of the stars in their paws." He is referred to by Purdy the elder as a "scrawny young piece o' nothin'." But he's a pretty big deal, as not only is he a protagonist of both the Power of Three and Omen of the Stars arcs, he also possesses the power to walk in other cats' dreams and sense their emotions (and occasionally specific thoughts and memories) at all times.

Jayfeather has absolutely zero qualms about infiltrating another cat's privacy, so he abuses his powers to extract whatever information he wants from others as often as he can, as well as simply to spy when he's feeling bored or curious. This is much to the chagrin of his mentor (and, unbeknownst to him for most of the series, mother) Leafpool, who lectures him about both that and his general disrespect for his warrior ancestors constantly. StarClan also gets quite annoyed with him, as they can't control anything he does, and he makes sure to never do what they say if he can help it. If you haven't gathered this already, this is one bratty little child.

His brattiness isn't as annoying as it sounds, though, because as I mentioned before, Jayfeather is blind, and also the runt of the litter. So he's just this tiny angry cat whose trademark is getting extremely pissed if anyone pities him or tries to help him with anything. His point of view is largely sarcastic, and serves as somewhat of a comic relief most of the time, enhanced by his lack of morals compared to the usually morally-conflicted, other protagonists. He originally wanted to be a warrior, but couldn't due to his blindness and obvious skill as a medicine cat, so another thing he likes to mope about a lot is how he "doesn't want to be a medicine cat" and is only doing it because "it's his destiny."

One of his strangest characteristics is his obsession with a stick he keeps by the lake, which is smooth and lined with oddly neat scratches. It makes a bit more sense if you keep in mind that it serves as a connection to the ancient cats who used to live by the lake. Yep, Jayfeather's powers give him the ability to interact with dead cats outside of StarClan, particularly this blind, hairless, cave-dwelling guy named Rock. He also time travels a couple times by temporarily possessing the body of Jay's Wing, who actually turns out to be his former self, whom he is reincarnated from. In short, he is involved in some pretty wacky stuff.