Destoroyah is often considered one of Godzilla's most merciless, intelligent, and genuinely evil foes, much like King Ghidorah, Gigan, and SpaceGodzilla. Unlike monsters that kill and destroy unintentionally and act only out of instinct or while under mind control, Destoroyah seems fully aware of the death and destruction he causes, and takes pleasure in causing it. His cruelty is most visible when he brutally attacks Godzilla Junior seemingly without provocation during their first encounter, then later kills him after attaining his much larger and stronger Perfect Form while the latter is trying to reunite with his father. While Godzilla is grieving over his son, Destoroyah attacks him on two separate occasions, even appearing to laugh while he drags Godzilla by the neck. Like SpaceGodzilla before him, Destoroyah is one of the few kaiju to exploit Godzilla's relationship to his son in order to attack him emotionally as well as physically. Destoroyah's strategies seem to revolve around causing as much pain to his opponents as possible, as his aggregate form is shown repeatedly stabbing Junior with his limbs and administering extremely painful doses of Micro-Oxygen into the wounds.