Karma Suzaku

Suzaku Karma, original name is Prince Hikaru Sanryōkyō of the Prisma Kingdom. Due to a traitor within his family's trusted advisors, Sir Kurakuro- He had planned to have the current commander of the royal knights take the throne. He had originally planned to have Him killed, a special guard personally tasked to protect the royal family, and Hikaru himself. Kamui Fin - a Pufferfish-Fishman. 

Fin tried his best to get young Hikaru out of the kingdom without harm, but one of the guards stabbed him and the boy through various spots, including Hikaru's heart. Fin kept the boy alive until he was out of the kingdom near the border - where an old friend of the queen, Hikaru's mother had been living found them, he was a former member of MADs, who specialized in cybernetics and genetic studies of linage factors. Fin sadly passed on, but in return - his blood as well modifying his body to adapt cybernetic replacement parts for organs. allowed for him to live, the key pieces to his body are the Helix Core and Aegis Driver. After recovering enough to live on his own, he took the name, Suzaku Karma. 

The name of his Devil Fruit is the Shell-Shell Fruit ( VIZ Media translation ) - The Main Power of this Devil is a mix of Shell Manipulation + Armor Manipulation, He's able to generate a suit of armor like an organic shell to protect and even fight with.

Modified Physiology - Due to his original body being heavily wounded, the doctor/scientist was commonly referred to as Doc Victoriastein. Je had to completely rebuild his spine, and rib cage with special metal-like replacements. He had also used a special set of a core engine plus an adjusted power source, simply known as a "Helix Core". The Helix Core uses the power-infused energy that can be linked to the similar power of the Mink Tribe's Electro. Suzaku can naturally control and even use the electro-like power, which he dubbed Sprite - his electric charges appear to be of a much higher voltage and deep reddish hue in color as well. The core engine in Suzaku's chest allows his body to function even with his repaired heart having a slower beat.