Sammie

Sammie is the ship's technician.

Given that Jackie's usually the one driving the ship, Sammie is extremely important because repairs are needed almost constantly. Because of this, her sleep cycle is usually off from the rest of the crew.

Sammie was Jackie's favourite mechanic whenever she docked the ship for repairs. Eventually, the repair bills were so high that Jackie figured it'd be easier and cheaper to hire Sammie as a member of the crew. Sammie, who loved adventure just as much as she loved repairing things, eagerly accepted.

While on the ship, she met OASIS and became its best friend. Given that OASIS doesn't usually get much conversation, a lot of what it learns is from Sammie. The two of them seem to have some sort of romantic relationship, though it's difficult to tell because OASIS won't stop talking about dragons whenever I ask it about this.