Soames is now more of a force of nature than a person. In essence, he's a warship, as the nanites infesting him remake him with awesome capabilities, in preparation to fight the final battle of a war long forgotten.
As Geron said, it honestly isn’t a very nice thing for Soames to do.
But, by that point of his tale he has been exiled and hunted.
Frankly, he’s tired of that sort of game and decides to switch it up a bit.
The Carnivore story short occurs during the rabbitoid assault on Ceres station, Soames is now one hundred and thirty years old or thereabouts.
He still looks just as he did the day he was reformatted by the nanites after the lab accident.
And he has since learned how to utilize their abilities.
The Council character who is the protag of the Carnivore short gets his first impression of Soames by watching him perform seeming wizardry, Soames motions with a hand, and something happens.
In the case of initial contact, he sees Soames pick someone off the floor and toss them via hand gesture.
What Soames is actually doing involves subverting the artificial gravity systems and manipulating n-space to propel items and nasty bits of annoyance “that away”.