Who was chekovs crewmate?

In "Star Trek," Pavel Chekov's crewmate is often considered to be Hikaru Sulu, who serves as the helmsman of the USS Enterprise. Both characters are part of Captain James T. Kirk's crew and are known for their camaraderie and teamwork during various missions. Chekov, portrayed by Walter Koenig, is the ship's navigator, and together with Sulu, they contribute to the success of the crew's adventures in space.