Aliases
| Name | Aliases |
|---|---|
| Katorenne E. Romancia | Catherine E. Romancia, Katoreenu E Romanshia |
| Katou Danzou | Assassin |
| Katrina | Hakkemii |
| Katsuki Bakugo | Kacchan, Katsuki Bakugou |
| Katsumi Daidou | Kamen Rider Eternal |
| Katsumi Nakase | フブキ (Fubuki) |
| Katsuragi | Lady Medusa |
| Katsuya Jonouchi | Joey Wheeler |
| Katsuya Suou | Suo Katsuya |
| Katsuya Tabuse | Dafu |
| Katt | Choi |
| Katz Kobayashi | Katz Hawin (カツ・ハウィン) |
| Kau | Inu, Dog |
| Kaworu Nagisa | Tabris |
| Kay | Kei |
| Kay Dowding | Purple Knight |
| Kay Faraday | Mikumo Ichijou |
| Kaya Irimi | Black Dog |
| Kaya Kidou | カヤ |
| Kaya's Mama | Mirai Satou (佐藤未来) |
| Kaya's Papa | Shizuo Satou (佐藤静夫) |
| Kayato Yakusa | Jock B (脳筋莫迦B) |
| Kaye | Kei Ru (ケイ・ルー) |
| Kayo Yuzuki | Kayochin |
| Kayuu | Mao (猫) |
| Kaz | Kattakuri |
| Kazane Haga | Volleyball Club Girl A (バレー部っ娘A) |
| Kazejin | Wind Devil Hyuuga |
| Kazemon | Fairimon |
| Kazuha Toyama | Kirsten Thomas |