Bock has long wild black hair tied back in a ponytail and straight brown horns on his head. His original crippled human legs were replaced with grayish white sheep legs.
He wears a dark blue jacket and a lime green shirt with black designs. He also has a mahogany gourd tied to his back.
Fen Bock is very loyal to Caesar Clown, since he calls him “Master.” However, when Caesar betrayed his underlings, he felt wronged and fled the facility with the Straw Hat Pirates and G-5 Marines. He was also scared of Smiley and did not know what it was.
Abilities and Powers
Four years ago, he was a prisoner on Punk Hazard before the incident involving Vegapunk's chemical weapon. After the incident, he lost the use of his legs due to the poisonous gas, but when Caesar Clown came to the island a year later, he was given artificial legs. Because of this, he and the other ex-prisoners gladly accepted Caesar as their master, not knowing he was the one who caused their paralysis. Later on, when Trafalgar Law came to the island, he was given animal legs along with the other ex-prisoners.
Punk Hazard Arc
He was first seen fighting the G-5 Marines outside of the lab along with the other ex-prisoners. He witnessed when one of the G-5 ships exploded, and he was terrified when slime globs from Smiley landed close to him and his comrades. He eventually retreated into the lab at Caesar's behest, and he warned his comrades that the laboratory shutter doors were being opened to let the G-5 Marines in.
Later, when Monkey D. Luffy started to corner Caesar, the scientist ordered the deadly H2S gas to be released into the lab, and how the subordinates can be replaced. Under the delusion that Caesar's cruelty was a ruse, Bock, among with the other subordinates, were horrified when Caesar used the gas he fused with to kill the subordinates present in the battlefield.
- A "fen" is a type of wetland.
- Bock means "goat" in German and is also the name of a strong lager from Munich; this rather fits his status as a satyr and that a calabash gourd like the one he carries is often used to carry liquors.
- One Piece Manga and Anime — Vol. 68 Chapter 668 and Episode 593, Fen Bock fights against G-5 Marines.
- One Piece Manga — Vol. 68 Chapter 670 (p. 13-14).
- One Piece Manga and Anime — Vol. 67 Chapter 664 and Episode 589, Brownbeard reveals the history of Punk Hazard and its inhabitants
- One Piece Manga — Vol. 68 Chapter 677 (p. 14).
- One Piece Manga and Anime — Vol. 70 Chapter 691 and Episode 617, Bock horrified that Caesar betrayed them.
- One Piece Manga and Anime — Vol. 70 Chapter 695 and Episode 621, Fen Bock is shown to have survived the battle against the G-5 Marines.