Red

When Kate first met Red he was a 15-year-old orphan living on the streets. He helped her and Derek Gaunt after they had just been injured fighting a vampire.

Julie Olsen was his girlfriend and even though he protected her out in the streets, he was just using her to get power.

When Bran died Red was there and Morrigan asked him if he wanted to be the Hound of Morrigan and he said yes because he wanted more power. When leaving with Morrigan Kate threatened that if she ever saw him again she would kill him.