Nihydron

In one possible timeline, the Nihydron are a space-faring species native to a region of space near the Krenim Imperium. In 2374, three Nihydron warships joined the USS Voyager in its attack on the Krenim weapon ship. B'Elanna Torres and Harry Kim were assigned to work with the Nihydron to implement temporal shielding aboard their ships. 

Nihydron ニハイドロン