Characters
- Kazuhiro Ishii
- Kazuki
- Kazuki (SSY)
- Kazuko
- Kazuma
- Kazumasa
- Kazumi
- Kazuo (Kyōshirō’s pack)
- Kazuo (Ōu soldier)
- Kazuto
- Kazuya Kudō
- Keeper
- Kei
- Ken
- Ken (GSDDD)
- Kenbō Sasaki
- Kenichi
- Kenichi Furuya
- Kenichi Kotani
- Kenichi’s father
- Kenkichi Maruyama
- Kenō
- Kenryū
- Kenshin Nokizaru
- Kenta
- Kentarō Kusabuki
- Kerry
- Kesagake
- Kevin
- Kichinosuke
- Kiev
- Kihē
- Kihē Itō
- Kikuchi
- Kikumaru
- Killer Fang
- Kimi Taguma
- Kimura
- Kinge (SSY)
- Kinge’s cub
- Kinichi
- Kinji
- Kinta
- Kintarō
- Kinumaru
- Kinun
- Kirikaze
- Kisaragi
- Kisaragi’s pups
- Kisaragi’s son (white)
- Kisuke
- Kittens
- Klem
- Knuckle
- Kobushimaru
- Kōchō
- Kōga Elder
- Kōgetsu
- Kogomi
- Kogorō
- Kōichi
- Kōichi, Kōji, and Mitsuo’s mother
- Kōji
- Kojirō
- Kojūrō
- Kōkichi Takuma
- Kokujūō
- Kokuō (Hayate’s opponent)
- Kokuō (Seiran’s opponent)
- Kokuryūō
- Köln
- Komaki Takahashi
- Kondō
- Kongō
- Koro
- Koroku
- Kōsaku Fujiwara
- Kōsetsu
- Kōshirō
- Kōshirō siblings
- Kōshirō Yamamoto
- Kosuke Ishigaki
- Kōta
- Kotarō Itō
- Kotetsu (BNF)
- Kotetsu (Ginga)
- Kotetsu (SSY)
- Kotobuki
- Koyuki (GDATJ)
- Koyuki (Weed’s mate)
- Koyuki’s and Weed’s pups
- Kōzō Maihara
- Kuma
- Kumonryū
- Kunisada
- Kuranosuke
- Kuro
- Kurobē
- Kurogane
- Kurojaki