From Bulbapedia, the community-driven Pokémon encyclopedia.
Manuke (right) with Luisa (left) and Ravine (center)
Manuke (Japanese: マヌーク Manuke) is a character from White—Victini and Zekrom and Black—Victini and Reshiram. He lives in the arid desert, where he works for his village's leader Ravine.
In White—Victini and Zekrom, Manuke witnessed, along with the rest of the village, Damon summoning Reshiram in order to save them from a tornado and a rampaging herd of Bouffalant. In Black—Victini and Reshiram, he was seen in Damon's flashback of him asking Ravine to support his idea. After Ravine tossed Damon's book on the ground, refusing his idea, Manuke picked it up and handed it to him.
Manuke was later seen with Ravine and Luisa, along with the people of the tundra village, in both movies, where they show their support for Damon's idea.