Angel (season 1)
At the end of the third season of "Buffy", the 242-year-old, re-ensouled vampire Angel left Sunnydale to give teenage Slayer Buffy Summers the chance to live a normal life. Angel is now living in the big city of Los Angeles. With Buffy gone Angel is now completely cut off from society, every day getting closer and closer to giving in to his vampiric hunger. It's not until he befriends the half demon and fellow Irishman Doyle, who is sent visions of people in trouble by The Powers That Be, and fellow Sunnydale resident Cordelia Chase, who grounds Angel's life in the humanity around him, that he truly begins to take charge of his life and seek atonement for his past sins. He sets up his own detective agency, Angel Investigations and begins to "help the helpless".
Angel (Buffy the Vampire Slayer)
In the character's backstory, he was born Liam in 18th-century Ireland and, after being sired, assumed the name Angelus, achieving infamy as the most sadistic vampire in European history. After angering a Romani clan, he was cursed with his human soul, leading to great personal torment and the decision to resist the evil impulses that come with being a vampire. He later assumes the shortened name Angel, and over the course of "Buffy" and "Angel", he matures into an altruistic champion of mankind, and learns he is a central figure of several prophecies concerning an approaching apocalypse. "Angel" ended its five-year run in 2004. However, the canonical comic books "" (2007–2009), "Buffy the Vampire Slayer Season Eight" (2007–2011) and "Angel & Faith" (2011–2013) depict the character's continued story, in which he is caught up in events of cosmic proportion and must deal with the fallout from enormous mistakes he has made.