Three Ryūdōin Brothers

This team is introduced in the anime. They seek revenge on Might Guy for their father's humiliation and death. They manipulated wooden dummies to attack Guy, which failed due to Guy's great taijutsu skills. It is then revealed that Guy had great respect for their father. Guy said that their father was a great and brave man who wished to fight Guy again one day. The brothers all feel like they misinterpreted their father's departing words.

Naruto: Path of the Ninja 2
They also make an appearance in Naruto: Path of the Ninja 2 they try take over the world using the power of the Great Spirit Beast who has the power to turn people evil. Rokkaku dies in the game at the hands of Gaara, and Genshō kills Jakō because he couldn't hold off the Konoha 11 and Sand Siblings long enough. The Konoha 11 and Sand Siblings seal the Spirit Beast but Genshō combined with it to keep it unsealed. The Konoha 11 and Sand Siblings defeat the Spirit Beast at the same time killing Genshō.