Doyle
Warning: Plot details follow.Doyle was a character in the fictional buffyverse created by Joss Whedon.
Doyle came to Angel when he first moved to Los Angeles after having said goodbye to Buffy in Sunnydale. He presented himself as a messenger from The powers that be, here to help Angel do good deeds, and eventually make ammends for all the acts he committed as the uber-vampire, Angelus.
To aid him in this mission, Doyle was given a gift of visions, he would recieve a vision from the Powers if someone was suffering, and Angel would be despatched to help.
Doyle had something of a fancy for Cordelia, the other worker in Angel investigations. He was too nervous however to voice these feelings, possibly due in part to him being half-demon.
Doyle eventually gave his life to save others of his demon race, but before doing so shared a final kiss with Cordelia, causing the gift of the visions to pass over to her so that she could continue giving Angel the information he need to help in his quest of "Helping the Helpless".