Angelus

Angel, sometimes referred to by his demonic name, Angelus, or by his human name, Liam, is a central figure in the mythos of the Buffy the Vampire Slayer television franchise. Played by actor David Boreanaz, he was introduced in the series pilot "Welcome to the Hellmouth" and remained as a supporting character throughout all of season one. With season two, Angel embraced his more evil side, becoming Angelus and served as the "Big Bad" of season two. Although the character was killed off in the season two finale "Becoming (Part 2)", he was resurrected in the fourth episode of season three "Beauty and the Beasts". After a slow healing process, Angel's noble personality became dominant again. Following the two-part climax of season three, the character relocated from the fictional town of Sunnydale for the dark alleys of Los Angeles, where he was the feature character in his own spin-off series Angel. Bringing along Buffy co-star Cordelia Chase, the character took on the role of L.A.'s night time avenger and also that of CEO of Angel Investigations. The character appeared in all 110 episodes of his own series and has also appeared in various book and comic book adaptations.