Hogback

Dr. Hogback is a Doctor who is a "genius surgeon" who is famous among all doctors around the world. He was known to save thousand of lives with his miracle operations. Many many worldwide doctors would travel to him and honor him.

But one day, he vanished. It was thought to be a kidnapping plot or he disappeared. His name has faded into legend. In reality he travelled to Thriller Bark where he does a research to surpass human imagination. He may be responsible for creating all the Thriller Bark Creatures.

Chopper who is a doctor himself knows about Hogback and always wanted to meet him.

Hogback resides in his mansion in the middle of Thriller Bark.

After the invisible creature that attacked nami escaped Dr. Hogback was talking to it.