| | Name | Type(s) | Team(s) | Source | Notes | | | K-9 | Robot | | Dr. Who | | | | Kamandi | | | DC | | | | Karate 1 | Cyborg, Fighter | Bionic Sixteen | Bionic Six | | | | Karate Kid I | Fighter | Legion of Superheroes | DC | | | | Karate Kid II | Fighter | | DC | | | | Karkas (Deviant) | | | Marvel | | | | Karnak | Eternal | | Marvel | | | | Karnilla | Magic | | Marvel | | | | Katana | Fighter, Killer | Outsiders | DC | | | | Katara | Elemental | | Avatar | | | | Kathryn Janeway | Leader | Leadership Council, Starfleet | TV: Voyager | Promote her to Admiral | | | Katie Power | Child | Power Pack | Marvel | | | | Kato | Fighter | Investigators | | Must be with Green Hornet | | | Katsushiro Okamoto (The Kid) | Fighter | Rebels | Anime: Samurai Seven | | | | Kazar | Fighter | | Marvel | | | | Kenshin | Fighter | | Anime | | | | Keyo | | | Anime: Zatch Bell | Must be with Zatch | | | Kid Amazo | Super Person, Youth | Justice League North America | DC | | | | Kid Devil | Powersuit, Smarty, Youth | Explorers | DC | | | | Kid Omega | Super psychic | Mutant Ninja Turtles | Marvel | | | | Kid Terror | Brick, Youth | New Warriors | Project Superpowers | | | | Kid Dinosaur | Child | Power Pack | Wildcards | | | | Kikuchiyo (Robot) | Brick | Generation Next | Anime: Samurai Seven | | | | Killraven | Fighter | Rebels | Marvel | | | | King Tiger | Fighter, Magic, Pure of Heart | Strange, Inc. | | | | | Kinsolving | Normal | | DC: Electric Warrior | | | | Kira Nerys | | Starfleet: DS9 | TV: DS9 | | | | Kismet | Cosmic | | DC | | | | KITT | Vehicle | Investigators | TV: Knightrider | | | | Kitty Pryde | Fighter, Unique | Secret Sixteen | Marvel | | | | Knightwing | Super Person | | DC | Superman's grandson | | | Knockout | Brick, Killer, Redeemed | Suicide Squad | DC | | | | Kohaku (Dragon) | Magic | | Anime: Spirited Away | | | | Komodo | Fighter | SWAT Team | Marvel | | | | Kooey Kooey Island | Unique | | DC | | | | Korvac | Cosmic | | Marvel | | | | Kraki | Fighter, Killer | Another Day, Another Dungeon | Lit: Another Day, Another Dungeon | | | | Kris | Iron Will, Normal, Youth | Quest, Inc. | Harbinger | | | | Kristoff | Powersuit, Smarty | Guardians of the Galaxy | | | | | Kro (Deviant) | Leader | Rebels | Marvel | | | | Krypto | Animal, Super Animal | Power Pack | DC | | | | Kubik | Cosmic | | Marvel | | | | Kup | Robot | Quest Inc. | Transformers | | | | Kurse | Brick | Legion of Substitute Heroes | Marvel | | | | Kwai | Magic | | Mileston | |
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