Ko
| Ko | |
|---|---|
 Ko, as he appears in the manga. | |
| Name in Kanji | コウ |
| Name in Romaji | Kō |
| Alternate spelling(s) | Kou, Koh, Koo |
| Allegiance(s) | n/a |
| Family | none known |
| Position(s) | Mamiya's younger brother |
| Appearances | Manga (ch. 28), Anime (ep. 23-25) |
| Voice actor(s) | Ryō Horikawa |
- Kō (コウ)
- Voiced by: Ryō Horikawa
- Mamiya's 15-year-old brother. He is taken captive by the Fang Tribe on the field and is slain in front of Mamiya and the villagers. In the original manga, he dies during his 15th birthday, but this was changed in the anime so that he was killed during Mamiya's birthday instead while he was collecting strawberries for her birthday cake. His necklance is stolen by ones of the tribesman, but it is later recovered by Kenshiro and Rei and returned to Mamiya. His death bear a small similarity with Mad Max 2 (when the captured villagers get executed).