Mikhail Diagilev

The chief engineer of the Cha-Cha Maru, Mikhail Diagilev might be the most loyal supporter of Tita on board. His service goes back to Tita's father the previous owner of the Cha-Cha Maru. He still bears guilt of allowing Tita's father to die when he jettisoned the engineering section eleven years prior and would die rather that seeing Tita die as well.

Source: Wikipedia