Conquest

He is a sadist who annihilates entire races without hesitation in the name of the empire. He enjoys toying with his opponents and always holds back, although if the rival is truly worthy, he will fight with everything he has.

He is an old Viltrumite of several thousand years, he survived the great purge (an event in which all the Viltrumites exterminated each other, cutting off a large part of their population, an act justified by the Grand Regent Thragg because they wanted to end the weakness of the empire after the death of Emperor Argall) with Thula and General Kregg who are his companions in the empire.
He survived the Scourge virus, which was created by The Betrayer (who also killed Argall) and with this virus brought the Viltrumites almost to the brink of extinction, leaving only about 50 pureblood Viltrumites left.

Everyone in the empire fears him and Treat him like a animal, so he feels genuinely lonely

Hes scared of the regent thragg since thragg is more powerful than him