Oliva is also known as "Mr. Unchained" (ミスター・アンチェイン, Misutā Anchein).
He is the strongest man in the USA and only man in the Arizona prison, who has complete freedom. Apparently at some point the government decided that it was cheaper to pay for his massive meals, his library and all the other expensive things he demanded in exchange for him living in the prison, where many prisoners are thanks to Oliva. He is an arrogant, attention-loving, brilliant and muscular man.
He is an enormous Afro-Cuban man with short black hair and a thin black mustache. At first, it's easy to mistake him for a man suffering from obesity, but on closer look it is noticeable that his body is just composed of muscles. In his debut, he wore a red shirt, and in the third season, he wears a purple one. He almost always has a smile on his face.
Baki the GrapplerEdit
Biscuit Oliva was dispatched by the USA to fight Yujiro Hanma. After fighting his way through groups of drug cartel mercenaries he encounters Yujiro at the leader's mansion and proceed's to kill the cartels leader, before trying to engage Yujiro in combat. However Yujiro surprises him with a front kick that knocks him several feet back and allow's Yujiro to make a get away. As Yujiro leaves, he tells him that he is not yet ready to eat, prompting Oliva to smile as he realise that Yujiro is going to become more powerful.
Oliva is a gigantic man with such musculature as to look overweight when wearing a suit. His muscles are dense enough to repel close range shotgun blasts and a thrust from a katana and he boasts that the only training he needs is to keep his muscles in check all day. He's training by pulling a helicopter down to the ground with his hand. He was capable of easily breaking the spine of a Kaioh Yoh who bragged that his body was as strong as diamonds. His punches are so strong that they often cave in the chest of his opponents, killing them instantly. He once punched Jun Guevaru so hard that all the GPS of the world started to shake and malfunction. In the fight with Baki Hanma, he rushed through four prison rooms and punched Baki through a steel door. He could slam Baki to the ground making a dent of 30cm deep. During the fight between Baki and Pickle, it was speculated that due to Oliva's size, strength, and fighting style, he would go for a frontal attack against Pickle. It was also stated that this would be a fellowship of two warriors with the same beliefs.
- His appearance and name are based on former Mr. Universe and three-time Mr. Olympia Sergio Oliva.