List of DC Comics characters: O

First appearance	World's Finest Comics #159 (August 1966)
Created by	Edmond Hamilton and Curt Swan
Further reading Chief O'Hara at the Comic Book DB (archived from the original) Chief O'Hara at the Grand Comics Database

Chief Miles Clancy O'Hara is a member of the Gotham City Police Department in the DC Universe based on the character of the same name from the television series Batman, portrayed by Stafford Repp.

The character, as adapted by Edmond Hamilton and Curt Swan, first appeared in the DC Universe in World's Finest Comics #159 (August 1966).

Within the context of the stories, Chief O'Hara is the chief of police during the early days of Batman's career. O'Hara was the first victim of the Hangman serial killer.^[1]

• Chief O'Hara appears in Tiny Titans.
• Chief O'Hara appears in Batman: The Brave and the Bold #17.

• Chief O'Hara appears in Batman with Robin the Boy Wonder, voiced by Casey Kasem.
• Chief O'Hara appears in Batman: Return of the Caped Crusaders and Batman vs. Two-Face, voiced by Thomas Lennon.^[2]
• Chief O'Hara's daughter, Chief O'Hara II, appears in The Lego Batman Movie, voiced by Lauren White.^[2]
• Chief O'Hara II appears in Batman '66.

O-Sensei is a fictional character in the DC Comics Universe. He first appeared in Dragon's Fists, a novel by Dennis O'Neil and Jim Berry, later being incorporated into the comics beginning with Richard Dragon, Kung Fu Fighter #1 (May 1975).

O-Sensei was originally a Japanese army captain in the 1890s who left after one of his soldiers killed a Chinese prisoner. In memory of him, the captain began training in martial arts and ancient disciplines, coming to train Bronze Tiger and Richard Dragon in the present day. Eventually, O-Sensei seeks the aid of Lady Shiva, Batman, Green Arrow, and the Question in returning to Japan to fulfill a vow to his late wife, only to be killed by a typhoon.

O-Sensei appears in Batman: Soul of the Dragon, voiced by James Hong.^[3][4] This version is the caretaker of Nanda Parbat who, prior to the film's events, previously trained Lady Shiva, Batman, Jade, and Rip Jagger in addition to Bronze Tiger and Richard Dragon and sacrificed himself to close the gateway to Nāga's dimension. In the present, Nāga possesses O-Sensei's corpse before Richard banishes him using the Soul Breaker sword.

Ogre is a DC Comics character who appeared in Batman #535 (October 1996), created by Doug Moench and Kelley Jones.^[5] Ogre is a genetically altered man, whose brother is a genetically experimented ape created by Doctor Winston Belmont. The man, Michael Adams, was increased in strength and the Ape in intelligence. The project created by Belmont was Project Mirakle, a top secret government project at Atsugi, where there were tested spy planes, as well as experiments on humans in the late 1950s. These experiments were made to create the perfect human agent but when funding was excavated so were the subjects. Michael Adams, as 23rd human experiment, managed to escape after 22 previous deaths. The Ogre tracked and murdered the scientists who collaborated with the project, only to be tracked by Batman himself. In the end, the Ape died and the Ogre wandered amidst the city alone in a story analogous to Mary Shelley's Frankenstein.

A character based on Ogre appears in Gotham, portrayed by Milo Ventimiglia. This version is Jason Skolimski, the son of Jacob Skolimski, a butler who worked for the affluent Constance van Groot; and an unnamed mother who left the family, leaving Jason to believe that Van Groot is his mother. After Van Groot rejected him, Jason killed her in anger, stole her money, and underwent plastic surgery with help from a nurse named Julie Kimble, who he later killed. Over the next decade, he adopted the alias of "Jason Lennon" and became a serial killer targeting young and attractive successful women, kidnapping and keeping them for weeks or months and later murdering and dumping them in various places of Gotham, leaving behind a hand-made drawing of a broken heart. Due to their loved ones being threatened, the Gotham City Police Department (GCPD) allow Jason to continue unimpeded, giving him the nicknames the "Ogre" and the "Don Juan Killer". Throughout the episodes "Beasts of Prey", "Under the Knife" and "The Anvil or the Hammer", Jim Gordon and Harvey Bullock attempt to stop Jason, who kidnaps Barbara Kean and forces her to commit a murder. Though Gordon and Bullock kill Jason and save Barbara, she is left psychologically shaken.

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Janie Olsen is a fictional character appearing in American comic books published by DC Comics. She first appeared in Superman's Pal, Jimmy Olsen (vol. 2) #5 as part of the "DC Universe" initiative and was created by Matt Fraction and Steve Lieber.

Janie Olsen is a playwright who is the sister of Jimmy Olsen.^[6]

A character based on Janie Olsen named Janet Olsen appears in Superman & Lois, portrayed by Yoshi Bancroft. She is depicted as Jimmy Olsen's sister who worked as a reporter at the Daily Planet during her early days before becoming a camera operator for GBS and a senior correspondent for the Daily Planet. Additionally, Bancroft also portrays Janet's Inverse World counterpart.

Onyx (Onyx Adams) is a fictional character appearing in American comic books published by DC Comics. She appeared in Detective Comics #546 (January 1985), created by Joey Cavalieri and Jerome K. Moore.^[7]

A former member of the League of Assassins, Onyx forsook that life and joined the same ashram monastery that the Green Arrow once belonged to. When the order's master was killed, she sought the Green Arrow to take down his killer. Onyx came to Star City seeking that same killer again.^[8][9]

She later became an ally to Batman during the Batman: War Games story arc when she joined the Hill Gang (led by Gotham City undercover agent and Batman's ally Orpheus), but she assumed the leadership following the latter's murder by Black Mask.^[10]

Following this story arc, she was not seen again until it was revealed that she worked as one of the Oracle's contacts for the Birds of Prey.^[11]

She became a trainer for Cassandra Cain in Bludhaven.

The New 52, Onyx appeared as an enemy to Green Arrow and member of the Outsiders, with most of her origins identical to pre-Flashpoint.^[12]

• Onyx Adams appears in the Arrow episode "Next of Kin", portrayed by Chastity Dotson. This version is a former member of the League of Assassins from 1743 who used a Lazarus Pit to survive into the present and become a black ops agent in Syria before several members of her team betrayed her. She forms a new team to kill the defectors, but is defeated by John Diggle and his allies and arrested by the police.
• Onyx makes a non-speaking appearance in Batman: Bad Blood.^[13] This version is a member of Leviathan who expresses romantic feelings for her superior Heretic despite being frustrated by his lack of emotions. In hopes of fixing this, she and Heretic kidnap Damian Wayne in an attempt to absorb his memories, only for Talia al Ghul to kill Heretic. Onyx subsequently seeks revenge on Talia, attacking her on a hovercraft and causing the vessel to crash and explode.
• A teenage Onyx Adams appears in Young Justice, voiced by Logan Browning.^[13] This version was raised by her maternal grandfather Amazing-Man, but ran away from home due to her fear of not being able to live up to his moral standards and was recruited by Sensei to join the League of Shadows. In the present, she comes to regret running away and is unknowingly tricked by the League into defecting from them and cause confusion for the Team. After joining forces with Artemis Crock and Cheshire to rescue Orphan, Onyx stays on Infinity Island for rehabilitation.

Elias Orr is a fictional character appearing in American comic books published by DC Comics. He was created by Brian Azzarello and Jim Lee during the arc of Superman: For Tomorrow.^[14]

Introduced in Lex Luthor: Man of Steel, Orr under Lex Luthor's employ assigned Toyman to stage an attack on Luthor's Hope, a genetically engineered superhuman.^[15] Revealed in For Tomorrow, he's a black-ops specialist working in the field of cybernetics labeled Project M helped to create Equus^[16][17] to battle Superman, as well as transforming Ron Evers, a friend of Vic Stone/Cyborg into a weapon.^[18] While confronting the Teen Titans, Mr. Orr encountered Cyborg and a villainous futuristic version of him called Cyborg 2.0. They created a "Cyborg Revenge Squad" consisting of Shrapnel, Gizmo, Magenta, Girder, Thinker, and Cyborgirl. Mr. Orr and his Cyborg Revenge Squad were defeated and his Project destroyed.^[19]

Elias Orr appears in Superman & Lois, portrayed by Christian Sloan. This version is a fixer for Intergang who is later accidentally killed by Peia Mannheim after she loses control of her powers.

First appearance	Superman (1978 film) Comics: Superman Returns: Prequel Comic #3 (August 2006, non-canon) Forever Evil #2 (December 2013, canon)
Created by	Mario Puzo David Newman Leslie Newman Robert Benton Tom Mankiewicz

Otis is Lex Luthor's bumbling henchman from the films Superman (1978) and Superman II (1980), portrayed by Ned Beatty. Following this, Otis has been utilized in several media adaptations, often taking on different positions and titles.

In Superman (1978), Otis assists Lex Luthor in his plot to steal two nuclear test missiles from the United States military and use them in a real estate scheme, only to be foiled by Superman and incarcerated in the same penitentiary as Luthor.

In Superman II, Otis attempts to join Luthor in escaping from prison. He is abandoned for weighing down Eve Teschmacher's hot air balloon.

Otis appears in Forever Evil #2 (December 2013) as a LexCorp security guard who is killed by Bizarro.^[20]

Otis appears in Superman Family Adventures #5 (November 2012) and Superman Family Adventures #7 (January 2013).

• A character based on Otis named Orville Gump appears in The World's Greatest Super Friends episode "Lex Luthor Strikes Back", voiced by William Callaway.
• Otis Ford appears in the Smallville episode "Scare", portrayed by Malcolm Stewart. This version is a scientist employed by LuthorCorp to manage a defense contract project involving a hallucinogenic gas.
• Otis Beatty appears in the Young Justice episode "Satisfaction", voiced by Kevin Michael Richardson.^[21] This version is the head of Lex Luthor's security force.
• Otis Graves appears in the fourth season of Supergirl, portrayed by Robert Baker. This version is Mercy Graves' brother and a former Project Cadmus agent who provided Ben Lockwood with the means to become Agent Liberty. After being seemingly killed by Hellgrammite, Otis is converted by Lex Luthor into a Metallo before the former is eventually killed by Lockwood. Following the events of the crossover "Crisis on Infinite Earths", Otis is revived as a human and found work with Lillian Luthor.
  • Additionally, an alternate timeline variant of Otis appears in the episode "It's a Super Life".
• Otis Grisham appears in Superman & Lois, portrayed by Ryan Booth. This version is initially an inmate at Stryker's Prison who leads the others in attacking the recently incarcerated Lex Luthor, who would later seek revenge by blackmailing the prison warden and guards. In the present, Otis and Luthor are released from prison and the former joins the latter in retrieving Bizarro. Otis later assists Luthor and Cheryl Kimble in experimenting on Bizarro and abducting Sam Lane, respectively before Otis attempts to assassinate Mayor Lana Lang, but is thwarted by Lana's daughter Sarah Cortez and taken into the Department of Defense's custody. Otis is later stated to have been found hanging in his cell before he could meet a prosecutor.
• Otis will appear in Superman (2025), portrayed by Terence Rosemore.^[22]
• Otis appears in a flashback in Superman Returns: Prequel Comic #3.^[23]
• Otis appears in the Young Justice tie-in comic book.
• Otis Berg appears in Smallville Season 11 as Lex Luthor's personal assistant at LexCorp who is killed by the Monitor.