The Belmont Clan is a Clan of Vampire Hunters, who are featured at the forefront of the Castlevania series. Beginning with Leon Belmont in 1072, the Belmont lineage has existed for nearly one thousand years, with their sole purpose being to slay Count Dracula after each one of his resurrections.
When Leon Belmont first met the alchemist, Rinaldo Gandolfi, he was blessed with the ability to harness magical power. It was through this event that the Belmont Clan developed abilities unseen in any other family, as the ability to harness magic became an inborn power of all Belmonts after Leon.
Upon their 15th or 16th birthdays, the members of the Belmont Clan go through a ceremony that denotes their transition into adulthood; this ceremony blesses them with extremely powerful sacred powers, which further sets them apart from other families. As such, the magic passed through their family tree, and the sacred power bestowed upon them, lead to each of the Belmonts possessing the same abilities/resistances.
The physiology of the Belmonts is constantly referenced in the series as being a generalized thing, further confirming that all Belmonts are born with the same abilities. During the events of Castlevania Judgment, Simon Belmont constantly refers to the powers of the Belmont family, as well as confirming that his abilities spawn from more than just the legendary Belmont whip.
↑Castlevania Judgment Aeon's Hyper Attack on Death
↑Akumajo Dracula: Kabuchi no Tsuisoukyoku Novel “I had said it before. I do not intend to bind the world with chaos.” “…… If so, why did you take power away from the crack in the eclipse’s seal? If you just intend to imitate like a monkey, isn’t your own power enough?” Those were the emotionless words of Death. In response, Olrox laughed his bold answer. “As I’ve said, I would equally gain control over the human world and the source of Dracula’s power, chaos. I do not intend to obey someone else’s mind aside from my own. That includes you who were born out of chaos.” “……” “You should be glad though to know yourself. Just by stealing power, my shameful monotonous time is over…… Even before Alucard appeared, just because I showed up and declared war on him.” Olrox’s voice was mixed with a tinge of thin delight. He respectfully bowed to Death who completely killed his emotions. “I would end the reincarnation cycle of this demon castle. I who understood and was spun out of the stains of chaos, swear to rob that power with my hands. Now, yield.” With Death’s reply, an explosive murderous intent rose. Two bronze colored scythes much larger than usual appeared; it advanced to the space in between the two men with an intention to cut off Olrox’s head. Kill the distance----- Kill the sound----- Just, faster, soon, die. It can be seen that the blades have certainly caught Olrox’s neck, but----- that is only an after image and the vampire is already at Death’s back. “……die.” That was said by the enemy who called on his servants. From the surrounding space, a group of purple bats rose, passed by Olrox’s arm with the speed of a bullet, attacking Death.
However, Death did not show any gesture of avoiding them. He simply faced Olrox and sprayed out numerous scythes. The bats and scythes cancelled each other out and the entire dance hall sparkled with blood."
↑Castlevania: Symphony of the Night Bestiary No. 44
↑Akumajo Dracula: Kabuchi no Tsuisoukyoku "From the time they stepped into the mountains, Curtis and Michelle felt malicious intent in the air.
Even though it is still far away, their bodies seemed to squeal [run away]. There was definitely no room for doubt. It is certain that the [castle] exists at the back of the mountains. The church’s greatest vampire hunter, Julius Belmont must be contacted. However, the conversation jumped into the matter of the disappearance of several village children."
↑Akumajo Dracula: Kabuchi no Tsuisoukyoku "A drawbridge suspended from the main gate is seemingly welcoming Michelle’s arrival. And her body was telling her [do not go] as her leg muscles were petrified like stone."
↑Akumajo Dracula: Kabuchi no Tsuisoukyoku "“Uh……aa……Mi……chelle……” That really is no doubt an obsession. The youth had more than 28 holes penetrating his limbs and body. His heart is already starting to fail and he is desperately trying to say something amidst the darkness. “Only…… protect…… you……-----“ When he said those words he must say, the man’s soul already left his body-----becoming one of the floating spirits that wander the halls of the castle. However----- Fate did not allow it. For those people who are involved with the demon castle, even the loneliness of death seemed half hearted----- The man’s soul is pierced by a small scythe that flew in from somewhere. That scythe did not exist physically. It was a diabolic blade created by some magic and possessed a strong soul."