In the "Castlevania" series, the Belmonts are the main antagonist. True or False?

Answer 1

False. The Belmonts, along with their legendary whip Vampire Killer, passed from generation to generation of Belmont, are the protagonists of the Castlevania series.
As far as the antagonists of the Castlevania series are concerned, while in the earlier part of the series, that's Dracula, in the later installments of the Castlevania series, the antagonists are those who wish to resurrect Dracula.

Answer 2

False, the Belmonts are the main characters. The main antagonist or villain is usually Dracula.