Like his godly forefather Orcus, Bryce is intensely sadistic with brutal, violent tendencies. According to Reyna, he is "remorseless" and is said to act like a "little psychopath." Indeed, he displays many traits characteristic of a typical psychopath, including a lack of empathy, ruthlessness, and a complete indifference to the suffering of others, if not an outright sadistic enjoyment of it, since he claims that the screams of the Fields of Punishment sound "like music to his ears." He also seems to be bloodthirsty, and claims to like "a good massacre."
As well as those traits, Bryce had a tendency to egregiously torture and murder all sorts of helpless animals, such as when he experimented on various ways to kill cats (one of which was setting one on fire), or when he stabbed a horse, inducing it to go on a rampage. His sadism and love of killing also extends to humans, him having admitted shortly before his own death at Nico's hands to having murdered his own centurion for fun, and he proceeds to scar Reyna's face with a javelin.
Overall, Bryce is nothing short of a remorseless and sadistic killer at heart, who delights in committing acts of ruthless violence