|This article is about a/an ally in Engine Sentai Go-Onger.|
Harunosuke (晴之助 Harunosuke?, 39-40): Harunosuke is a boy who comes from the Samurai World with his younger brother, Akinosuke, in order to protect the small Engine Sword (炎神剣 Enjinken?) with a part of Retsu-Taka's soul. Portrayed by Shohei Yamauchi (山内 翔平 Yamauchi Shōhei?).