Machvise is an officer of the Donquixote Pirate's Diamante Army.
Machvise and his four fellow officers later joined the fray. He got the jump on Boo and crushed him into the ground. However, Boo managed to withstand the attack. After the coliseum fighters banded together, Machvise tackled Boo. Afterwards, Machvise was confronted by Hajrudin. The officer later used his 10 Ton Vise attack to bring down the giant. Hajrudin lashed out with his signature attack, Gungnir, which sent Machvise rocketing towards the sky. His momentum took him through Doflamingo's 'Bird Cage', shredding him. He fell to the ground, motionless and incapacitated.
After Doflamingo's defeat, Machvise and his fellow officers were arrested by the Marines.
Powers and Stats
Origin: One Piece
Classification: Donquixote Family Executive, Pirate, Paramencia Devil Fruit User
Powers and Abilities: Superhuman Physical Characteristics, Weight Manipulation via Devil fruit (Can increase and decrease the weight of his body)
Speed: Massively Hypersonic via powerscaling
Lifting Strength: Class G+ via powerscaling
Striking Strength: City Class via powerscaling
Durability: At least City level
Stamina: Very High
Range: Standard melee range
Standard Equipment: Cross-Shaped Shield
Intelligence: Average, though has a number of years in combat skills and experience
Weaknesses: Too reliant on terminal velocity for his attacks
Ton Ton no Mi (Ton-Ton Fruit): Is a Paramencia-Type Devil Fruit which allows the user to increase their weight, making them a Super Weight Human (超体重（スーパーウエイト）人間, Sūpā Ueito Ningen). It was eaten by Machvise.
- 10 Ton Vise (10tヴァイス, Jutton Vaisu): Machvise floats above his opponent then crashes down with his limbs outspread. He is able to cover a large area with his huge body. It was first used in an attempt to crush Franky after protected him from the cyborg's rocket launcher, and named when he used it against Luffy, this time with Senor Pink holding their opponent's legs down with the help of his ability. Luffy managed to escape by stretching out of the way, and the impact of being hit with 10 metric tons did not appear to affect his rubber legs. The first time he managed to strike someone down with this technique was against Boo.
- Hakai no Senton Vise (破壊の千tヴァイス, Hakai no Senton Vaisu, literally meaning "1000 Ton Vise of Destruction"): 100 times heavier and more destructive version of 10 Ton Vise. While performing this move, he uses his unique shield to increase its power. Machvise attempted to use this move against Zoro but abandoned it midway in favor of using 10,000 Ton Vise against Hajrudin.
- Jigoku no Manton Vise (地獄の万・t・ヴァイス, Jigoku no Manton Vaisu, literally meaning "10,000 Ton Vise of Hell"): 1000 times heavier and more destructive version of 10 Ton Vise. While performing this move, he uses his unique shield to increase its power. It was first seen used against Hajrudin and was capable of shattering the bones in Hajrudin's forearm and leg and cause him to grit his teeth so much that a tooth broke, as well as crushing the ground beneath Hajrudin, but nonetheless was forced back by the giant's Gungnir, sending him flying.