A pirate who came across the abandoned Silver Blade and took it as his own.
With his crew he sailed the Sea of Thieves for awhile doing well for themselves. They would eventually come across a Voyage that would lead them to an Ancient Vault that held the remains of the Siren King and the Chest of Everlasting Sorrow.
After retrieving the Chest and remains, Dimitri and the Silver Blade was pursued by Skeletons and then attacked by Sirens who dragged it under the waves.
His last known whereabouts were in the Siren Citadel, where he and his crew came face to face with the Sirens and their Ocean Crawlers.