[Cloverspring]

Darkstripe.
He is weak, disloyal, and vindictive, which should make him a truly evil cat, but because he is also a coward these traits are often not even put into effect. This really causes him to have no redeeming traits.
His whole identity itself only seems to exist with whatever powerful/winning cat he is complementing. So much so that its hard to imagine what Darkstripe's character would be like when he is alone. Would he even have a personality of his own?

I do like the sound of his name though, and the combination of weakness with a craving for power is interesting to think about. Especially in comparison to Tigerclaw.