Hugo, nicknamed "Go", is a character who appears in the episode "BMO", serving as the main antagonist.
He is an inventor and the self-appointed leader of The Drift who tasks BMO with acquiring a crystal needed to complete a device known as "Unity Pod." It is later revealed that this is a device to allow him to leave the Drift, and that Hugo created this machine by exploiting the resources on the space station. However, when Hugo tries to power up his Unity Pod, the residents of The Drift band together to foil his plan, launching him into space by himself. While lamenting his loneliness, Hugo is later joined by the small worker robot Olive.
Hugo was once a human who "biohacked" his and his follower's DNA with the genetic material of the Gray aliens before arriving on the Drift, thus becoming Gray Elves.