Ko, as he appears in the manga.
|Name in Kanji||コウ|
|Name in Romaji||Kō|
|Alternate spelling(s)||Kou, Koh, Koo|
|Family||Mamiya (older sister)|
|Position(s)||Mamiya's younger brother|
|Appearances||Manga (ch. 28), Anime (ep. 23-25)|
|Voice actor(s)||Ryō Horikawa|
- Kō (コウ)
- Mamiya's younger brother. He was taken captive on his 15th birthday by the Fang Clan and slain in front of Mamiya and the villagers. His necklace is stolen by one of the tribesman, but it is later recovered by Kenshirō and Rei, and returned to Mamiya.
- In the anime, he is killed during Mamiya's birthday while out collecting strawberries for her birthday cake.
- His death bears a small similarity with Mad Max 2 (when the captured villagers are executed).