Inuyasha (20)
Kagura is fascinating. As one of the "offspring" of Naraku, she should be -- and is -- basically an evil character and a constant obstacle to Kagome and Inuyasha. But she has a mind of her own, she doesn't like being beholden to and controlled by Naraku, and she sometimes appears to have a "thing" for big brother Sesshomaru. Alas, we may never find out what happens to her.