In these cases, a non-vampire (like a human) is injected with vampire blood, and depending on their reaction to the blood and how many times they are injected, they're bestowed with temporary vampiric powers and become physically semi-vampiric.
This type of Vampire is also capable of absorbing other monsters, as seen is the case with Alucard.
The most powerful and renowned variant of any Vampire, also known as the "Super Vampire", is a type of Vampire who has powers far above the other varieties and the baseline version, who can only be 'propagated' by another Vampire either ingesting its blood or having it injected.
Variants include the converted "Temporary Vampire", the infamous Ghoul, and the powerful Shinso. Often referred to as a singular species, there are actually a number of varieties of vampires, sharing many similarities as well as distinct differences. These same aforementioned eyes often have the appearance of a vertical slitted pupils (which can be observed very clearly within Inner Moka & Akua, but not in particular with other vampires like Issa, Kahlua, or Kokoa), which is not too dissimilar to that of a fox, certain variety of cats, and especially that of a snake. Vampires are virtually identical, if not at least superficially the same to humans, but with the key distinction of having sharp fangs and red eyes. Possessing high battle capabilities and is not easy to kill, their strength is one of the greatest among monsters, but at the cost of such significant weaknesses like being weakened by rosaries (through the presence of silver) and water. Also known as The Immortal Ones, Vampires are often mentioned in the folklore of various cultures: a monster that sucks the blood of humans and livestock.