Aliases
| Name | Aliases |
|---|---|
| KLIN | Клин |
| Klonoa | Klonoa of the Wind, クロノア |
| Klopedia | The Wise One |
| Klose Rinz | Klaudia von Auslese (クローディア・フォン・アウスレーゼ) |
| Knight of the Pass | Headless Horseman (首無し騎士) |
| Knox | Kinkaku |
| Knuth | Cunus |
| Ko | Kou |
| Ko-gal Spirit | Kogyaru Rei |
| Kobasen | Kobayashi, Mr. K |
| Kobuhei Yamada | Jacob |
| Koby | Hero Koby, Coby |
| Kochi Kishima | Kiiko |
| Kodaimon Hiromoto | Yuzure Yellow (ユズレ・イエロー) |
| Kody | Idaho |
| Koeru Nobagoshi | NOVA (ノヴァ) |
| Koga Oogami | Koga Ogami, Kouga Oogami |
| Kogane Naruto | Kurenai Kogane-Tai (紅こがね隊) |
| Kogiri Sawai | Kawai Kogiri |
| Kogoro Mori | Richard Moore |
| Kogorou Katsura | Kogoro |
| Kohaku Syusetu | Kohaku Shusetsu |
| Koharu | 猫又コハル, Nekomata Koharu |
| Kohei Konishi | Kouhei Konishi |
| Koi Oh | Qiaoyi Huang |
| Koichi Haruyama | Parko |
| Koichi Hirose | Kouichi Hirose |
| Koichi Kizakura | Former Hope's Peak Academy Student Scoutsman, Kohichi Kizakura |
| Koichi Mizuno | Lance Romero |
| Koichiro Ebina | Ebina Kouichirou |