 Why was the ugly man constantly chasing after Gabe?
When overwhelming danger is constantly present,of course a man is entitled to have a bodyguard. Everyone in the room was aware of the big young man, and most of the humans present were resentful, for he handled himself consciously and arrogantly, as if his appearance alone were enough to make him superior to anyone. There was a short man standing next to the pair—young, as most men and women were in that time, thanks to the science which could stave off decay, though not death—but with no other apparent physical virtue, for plastic surgery had not fulfilled its bright promise of the twentieth century. "You must allow me to pay your cleaning bill," Gabe said, taking out his wallet and extracting several credit notes without seeming to look at them. And that, coming on top of Gabriel Lockard's spectacular appearance, was too much. The ugly man picked up the drink the bartender had just set before him and started to hurl it, glass and all, into Lockard's handsome face. There he inserted a coin in a locker, into which he put most of his personal possessions, reserving only a sum of money. As a matter of fact, no real identification was possible, for he was no one and had been no one for years. Each time it happens, there's a ... well, there's no experience to match it at a thrill-mill."
 He wanted his body back.
 He was actually after Gabe's wife.  He wanted his body back.  He wanted some of Gabe's money.  He was only following him by coincidence.