Lore Hartzenberg said the Olympian described his girlfriend, Reeva Steenkamp, as the right person for him.
But the prosecution slammed her findings, calling them unobjective.
"We're dealing with a broken man -- but he's still alive," Prosecutor Gerrie Nel said in apparent reference to the fact that Steenkamp is not.
"He has lost his love relationship ... but he will be able to love somebody else like that," Nel said.
The onetime South African sporting hero was found guilty of negligent killing last month in the 2013 death of his girlfriend. He returned to court Monday for a hearing that will determine whether he's going to prison.
Judge Thokozile Masipa,