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Onus is the tertiary antagonist in Treasure Planet. He is a small slug-resembling alien bearing six eyes and is one of the pirates in John Silver's crew. As such, he serves as the lookout, as he is constantly seen in the crow's nest of the Legacy. He is one of the only few pirates to survive during their mutiny, as he is arrested by Captain Amelia and Dr. Delbert Doppler for his crimes alongside the remaining crew.
"With pleasure, captain!"
crew about to hurt Jim
Crew can't belive what they see
Onus's defeat along with the other surviving pirates
Onus alongside the remaining crew cheering for Jim for saving them from the exploding planet