Igor Karkaroff: [United Kingdom] The headmaster of the Durmstrang Institute from J.K. Rowling's series Harry Potter.
Idgit the Midget: [USA] One half of the criminal duo Dangerous Dan McBoo and Idgit the Midget (Disney).
Imra Ardeen Ranzz: [USA] The married name for the pre-crisis Saturn Girl from DC Comics' Legion of Super-Heroes.
Indian-dockan: [Sweden] The Indian doll from Rune Andréasson's series Pellefant.
Indiana Pipps: [Italy] Goofy's adventurous cousin (Disney).
Insect Queen: [USA] The super-hero identity of pre-crisis Earth-1 Lana Lang in the Legion of Super-Heroes (DC Comics).
Invincible: [USA] Character from Robert Kirkman's part of the Image Universe.
Irma: [USA] The waitress at the diner where Jon hangs out (Garfield & Friends).
Irwin Troll: [USA] The happy troll from Russell Myers' series Broom-Hilda.
Iznogoud: [Frankrig] René Goscinny and Jean Tabary's Grand Vizier who wants to be Caliph instead of the Caliph.