List of DC Comics characters: I

I.Q. (Ira Quimby) is a fictional character appearing in American comic books published by DC Comics.

Ira Quimby is a small-time crook who is accidentally exposed to the radiation from a rock that had been irradiated by one of Rann's Zeta Beams. Quimby discovers that due to the activation of his metagene, he has gained a genius level intelligence. Dubbing himself I.Q., he uses his new intellect to plan a series of jewelry heists. I.Q.'s heightened intelligence turns out to short-lived, but re-exposure to the rock restores it. Hawkman is able to track down I.Q. by analyzing traces of the rock, and arrests I.Q. and his gang.

In Hawkman #7 (April 1965), the imprisoned I.Q. discovers that his heightened intelligence returns whenever he is exposed to sunlight. He is able to create an invisibility device out of common items and escape from jail, and resume his life of crime. In subsequent stories I.Q. faces the Justice League of America,[1] Superman and the Metal Men,[2] Batman,[3] the Teen Titans,[4] the Atom (Ray Palmer),[5] and the Elongated Man.[6]

During the Infinite Crisis storyline, I.Q. popped up as a member of Alexander Luthor, Jr.'s Secret Society of Super Villains.

In 52 Week 23, I.Q. is revealed as one of the "mad scientists" kidnapped by Chang Tzu and Intergang, and taken to Oolong Island to become a member of the Science Squad. When Black Adam attacks Oolong Island, he remained collected and rallies his fellow mad scientists to successfully defeat Black Adam.[7] He subsequently becomes the head of projects on the island.[8]

In the 2009 Justice League: Cry for Justice series, it was revealed that Quimby was working with the supervillain Prometheus, who repaid him by causing his brain to revert to an infantile state.[9]

He has since been seen in Doom Patrol, working for Veronica Cale on Oolong Island. Quimby's appearances in this title have yet to explain the recovery of his faculties, but they chronologically follow the events of Cry for Justice (as seen in the Justice League of America title which has the team dealing with the aftermath of CfJ leading into Blackest Night).

Insomnia, also known as Christopher Lukas, is a fictional character appearing in comic books published by DC Comics. Insomnia first appeared in an unnamed cameo appearance in Lazarus Planet: Dark Fate #1 (February 2023), before being fully revealed in Knight Terrors Special Edition #1 (May 2023).

Insomnia was the main villain of the Knight Terrors event, in which he sent many heroes and villains into nightmare states in his search for the Nightmare Stone.

Inza Cramer (also Inza Saunders) is a fictional character appearing in American comic books published by DC Comics. Inza debuted in More Fun Comics #55 in 1940, and was created by writer Gardner Fox and artist Howard Sherman.

Originally, the character was created as a love interest for Kent Nelson, whom starred as Doctor Fate. She would eventually become the fourth (and second female) character to bear the Doctor Fate codename. Her incarnations differs from other versions, whom are traditionally considered agents of the Lords of Order, whearas she was unknowingly a agent for the Lords of Chaos.

In a scheme to lure in Doctor Fate, Inza was kidnapped by the scientific villain, Wotan. Inza and Doctor Fate meet, the woman enamoured with a life potentially filled with adventure and would accompany Doctor Fate as his partner. Eventually, Kent Nelson revealed his identity to her and she would support him when he became a medical doctor, accompanying him as a nurse. At some point, she also pursued a doctorate in archaeology similarly to her husband.[10]

Later, the two would marry, with the magic of the Tower of Fate keeping them young. Overtime, their marriage became strained due to Nabu's influence on Doctor Fate and Inza coming to resent having to be in a passive role within the Tower of Fate, resulting in a loss of a social life. Despite later having some romantic feelings for another man, Inza ultimately remained faithful to Kent with intent on working through their martial problems.[10]

Eventually, Inza and Nelson would be killed in the wake of the cosmic event known as kali yuga, the Lords of Chaos empowered and weakening Nabu, rapidly aging both of them and the strain being too much for Inza to bear. Eventually, Nelson too was killed and in the aftermath, the two would live out their afterlfie within the Amulet of Anubis for a time, the pair creating the life they missed out in their lifetime in the dimension, including a child.

Eventually, the pair are resurrected into younger bodies and Inza becomes the sole Doctor Fate for a time, unable to merge with Nelson. As Doctor Fate, Inza's methods are more proactive although she becomes more reckless in their use, stemming a temporary separation from Kent. The two reconcile their differences upon learning Inza's patron as Doctor Fate originating from a Lord of Chaos, making her an agent of chaos. The Chaos Lord revealing himself to have subtly influenced some events enough to cause the two to have strife against one another and enjoyed having the Lords of Chaos be a force of good, reasoning that even Chaos Lords did not find evil as favorable. The Chaos Lord would relinquish the powers bestowed to Inza back to himself although she would replace her chaos magic with magics stemming from life and continued acting as Doctor Fate, with Nelson acting alongside her.[11][12] When operating as separate Doctor Fates, Inza wears the helmet and Kent's original costume while Kent wears the half helmet and costume he used in the late 1940s.[13] Sometime later, the Nelsons and the JSA face the supervillain Extant during Parallax's attempt to change the history of the universe. Extant uses his time manipulation powers to rapidly age Kent and Inza to their proper physical ages. Extant also scatters the helmet, amulet, and cloak. The aged and depowered Nelsons then retire.[14]

Ishmael is the name of different characters appearing in American comic books published by DC Comics.

Isis is Selina Kyle's pet cat, who often assists in her heists. Created for Batman: The Animated Series, she first appeared in the episode "The Cat and the Claw" (September 1992).

When Selina was taken to prison, Isis ran away looking for her. Isis got lost and was found on the streets by Professor Milo, who used her for one of his twisted experiments and infected her with a virus that made her more aggressive. Selina feared she had lost Isis forever, but Batman delivered Isis back to her, completely cured and safe. Isis was voiced by Frank Welker for most of the character's appearances and by Dee Bradley Baker for the animated web series Gotham Girls.