...Inuyasha

Characters

Sesshoumaru could be called a main character... except that he disappears for long periods of time... He is Inuyasha's older, half brother.  A full dog demon and Lord of the Western lands.  He is incredibly powerful.  He has a humanoid form and a demonic form.  In his true form he is a giant white dog the size of a house!  He is very cold and unemotional, and he isn't overly fond of Inuyasha.  At first he tried to kill him, but I think he's over that now.  Sesshoumaru is the only character that I think really changes.  At first he despised humans (or maybe had no use for them is a better term - but then, he has no use for anyone) but then he saved a human girl who had tried to care for him.  He allows her to travel with him.  He also keeps Inuyasha from going on the rampage when Inuyasha's demon blood gets the better of him. And they actually work together several times, and he saves Kohaku from death... so he's a little confusing.  But, as Totousai says, he's "evil incarnate"... wait, isn't that Naraku's job? Actually, Sesshy ain't so bad.  He's just indifferent and a ruthless killer at times...

race: dog demon, baby! (he's not a baby...)

occupation: demon lord ^_^

weapon: tokijin (sword with a mind of its own, but he's strong enough to handle it), energy whip, poison claws.  He also carries Tenseiga, a sword made from his father's fang, but it can only heal, not kill. 

age: not absolutely positive, but I've heard several hundred to a thousand or more years old.  The creator says he's supposed to look 19 though...