Kavan was a savage and ferocious thug who reveled in creating havoc. He especially enjoyed doing so in full daylight.
Kavan possessed many of the abilities and aversions that were typical of vampires, though he was immune to the harmful rays of the sun.
Kavan was known to wear a suit of masterwork chainmail armor and a pair of gauntlets of ogre power. He typically wielded a +1 bastard sword.
Kavan was one of the first successes of Strahd's efforts to create a new strain of vampire minions, possibly even daywalkers, that would be capable of operating during daylight hours.
Kavan served Strahd as an agent and spy. While his impulse for violence made him terrible at acting covertly, he could make an accurate assessment of a potential foe's fighting skills as a result. His standard tactic was to charge right in, fly into a rage, attack whoever was nearest, and battle on until his body was destroyed and he was forced to return in gaseous form to his crypt under Castle Ravenloft.