Ghouls

Ghouls are the result of a vampire putting in too little of its blood during an embrace or a vampire making someone ingest their blood orally. Ghouls are considered as weak as thin-blooded vampires, being slightly weaker than them even then physically, and weaker than a "Changed" Vampire Hunter, and a fighting chance for "Fresh" Vampire Hunters. Ghouls are also addicted to and rely on the vampire's blood who sired them to survive, Ghouls can drink the blood of other vampires, but it isn't as filling as their sire's blood, and considered not worth it. Appearance-wise, ghouls carry the same paler complexion that vampires do, but show cracking in their skin, as a result of the half-effort Embrace. Alas, there is a way for Ghouls to advance, and that is by killing and drinking the blood of enough vampires to ascend into thin-blooded status, or by their sire injecting more of his blood into the ghoul to "finish" the embrace that was started prior. The latter option is rare though, as vampires whose progeny becomes a ghoul, naturally hate the Ghoul and would almost never consider ascending him into Vampiric status. Ghouls are also formed by thin-bloods attempting to embrace someone, as they would naturally would need to pool mass amounts of blood into the system of the person due to how diluted their blood is normally, which would bring them to the point of physical exhaustion.