He becomes more jovial and less feral when drunk, though he can be knocked out of this state if something important, like his stilts breaking, happens. Unless he's extremely drunk, Mácula shows signs of territorialism towards any intruders on his castle, cornering and going for the kill as soon as he hears something unknown to him, almost in a predatory manner as he never talks to Mortadelo or Filemón when he finds them, only roaring and slowly approaching them.
He has something of a tragic side to him, since even as a vampire he still considered his state a curse. Though we don't see any nefarious acts besides abusing his servant while in a drunken state, he had built up a reputation as this highly evil and terrifying individual, though his reign of terror became a mystery as time went by, since Mortadelo and Filemón didn't seem to be aware of his existence. He menacingly narrates his last memoir to himself, as well as a crow or raven on his desk, possibly aware of the fact that there was someone looking at his castle at the time. Mácula is initially seen as completely serious and very sinister, far more than any Mortadelo y Filemón villain up to that point, especially with the potential threat of this villain taking out Mortadelo and Filemón for good by drinking their blood and killing them, though it's later revealed that he can be just as comical as most other Mortadelo y Filemón villains, not being a bloodthirsty monster but rather a short vampire on stilts that likes to get drunk with all kinds of wine, having a large collection of barrels in his castle's basement and wine cellar.
Mácula bearing his fangs upon hearing the intruders on his castle.