Ann O'Brien is a comic book superheroine created by American comic book artist Art Adams. Along with Axwell Tiberius, she is one of the two primary characters in Adams' Dark Horse Comics series Monkeyman and O'Brien.
Ann O'Brien was created by writer/artist Art Adams, who conceived of Monkeyman & O'Brien as series that would enable him to draw monsters similar to the classic movie monsters that he enjoyed in his youth, like Godzilla, King Kong and the Universal Monsters. Adams named O'Brien in tribute to Fay Wray's character, Ann Darrow, from King Kong and that film's special effects creator Willis O'Brien,
The character debuted in Dark Horse Presents #80 (December 1993) in a story titled "A Monkeyman & O'Brien Adventure: Tortorus". She next appeared in a backup story entitled "Who Are Monkeyman and O'Brien?" in Mike Mignola's 1994 series Hellboy: Seed of Destruction. The character made further appearances in several short stories in Dark Horse Presents, a three book limited series titled Monkeyman and O'Brien (1996), and a crossover miniseries Gen 13/Monkeyman and O'Brien (1998). The character's last published appearance was in 1999 in a comic strip in Dark Horse Extra, newspaper style comics fanzine.
Ann Darrow O'Brien is the daughter of eminent scientist and explorer, Professor William S. O'Brien. Missing for two years, Professor O'Brien left his daughter Ann and her assistant Akiko Oki living in his palatial Bay Area estate. To the surprise of many, the young Ann had been keeping the estate solvent. Ann's amoral half-sister Oniko (who left the family 15 years earlier to join a mysterious criminal enterprise) and her two henchmen invade the estate to take it over. The sisters have a brawl in an unused dimensional transportation chamber, and Ann accidentally hits a button that kicks off a "life form retrieval beam." The chamber explodes as it summons the giant, simian genius Axewell Tiberius, who's combating an unknown, ape-like enemy. The henchmen escape with Oniko and the still-living head of Tiberius' enemy, while Ann and Akiko befriend Tiberius and give him a place in the estate's library.