Roku

was a hanyō from Hōrai Island, and was Dai's twin brother. He appears only in the fourth InuYasha movie.

History
As young children, Roku and Dai survived the Four War Gods' attack on the island and received the Mark of the Shitōshin to prevent them escaping. They were destined to be used as fodder for the War Gods' own purposes until Inuyasha's group saved them and the other half-demon children. At the end of the film, he sets out with the other remaining half-demon children to live in the outside world.

Personality
Both Roku and his twin often annoy Inuyasha by telling him he will be unable to defeat the Four War Gods. Though they have annoyed the others at times as well. They are both very immature and have smart mouths, making witty and unnecessary comments at times.

Physical description
Roku and Dai are both nearly identical in looks. They are both tanned and have sharp, defined features. They have orange eyes and pointed ears (showing they are both half-demon). The way to tell him apart from Dai, is that Roku's hair is mostly green, and his outfit is a lighter shade of blue.

Outfit
Roku wears a light blue tunic with rope tied around the waist. He is barefoot all the time, like the other half-demon children even Inuyasha.

Powers & Abilities

 * Immense Durability: Roku has demonstrated his durability when large parts of Hōraijima was destroyed by Gōra and the true form of Shitōshin while he was present. However, although several flashes and explosions occurred in the vicinity of the children, they were hardly injured.
 * Longevity: Roku has not grown older for over fifty years. And it is implied that he has been on Hōrai Island for centuries.

Trivia

 * It is implied that he is the older of the twin brothers. When Asagi is on the way to the Cauldron of Resonance, he says that he is next to the turn, and after him Dai.