Duke

Duke is a huge, black-and-white tom with a spiked black collar and several nicks in both his ears.

The Lost Warrior

 * Duke is a vicious kittypet, feared by all the other cats in Twolegplace, who say he has never lost a fight.


 * When Graystripe first strays out of his Twolegs' territory, Duke is enraged, because he supposedly is trespassing on his territory. Duke threatens to attack Graystripe, however, Graystripe calls him a fat and lazy kittypet. Duke snaps, which causes him to attack Graystripe. Despite being a trained Clan warrior, Graystripe has gotten out of shape from living in the Twoleg nest so long, and loses the fight. This makes him stop and think if he is still truly a warrior of ThunderClan, or if he is turning into a soft kittypet. Soon after his fight with Duke, Millie, another kittypet, comforts him by saying that no cat has ever won a fight against Duke and he shouldn't be ashamed.


 * Later, when Graystripe is teaching Millie warrior skills in a wooded clearing, Duke comes in with two other tough cats. He tells the two to leave, saying that it is his clearing, even if he hardly goes there, thus starting another fight. This time, training with Millie has strengthened Graystripe; he attacks Duke, while she deals with his two companions. Defeated, Duke runs off, humiliated and frightened, calling Graystripe a savage and saying that he could have been killed.

Warrior's Return

 * Although Duke does not formally appear, he is mentioned by Graystripe when he and Millie get attacked by a gang of kittypets, and while fighting them, Graystripe notices that the kittypets are not pampered pets, and compares some to Duke.