Tsukune Aono Ghoul Alternate version 1

Tsukune Aono Ghoul - Rosario+Vampire
When Inner Moka was facing off against Kusabi Mido of the Anti-Schoolers, Tsukune is fatally injured trying to protect her, causing her to inject him with her blood in an attempt to save his life. However, his already-weakened body was overwhelmed by the blood's power, resulting in his transformation into a Ghoul. In this form, Tsukune resembles a vampire with silver/black/brown (it varies) hair and red eyes, as well as black flame-like marks that spread across his body from the bite marks to his face. As a Ghoul, he possesses strength equal to a super-vampire and extreme regenerative powers, yet water, a vampire's greatest weakness, does not affect or weaken him because he was formally human. However, this transformation came with a heavy price: Tsukune lost all rational thought, becoming a mindless, killing machine driven by a pure, uncontrollable desire to shed blood, and unable to distinguish friend from foe. Being super-vampiric berserkers, Ghouls are nearly impossible to kill or control, and only an opponent of equal or greater strength has a chance to restrain them. As a result, the creation of a Ghoul is considered one of the gravest crimes in the monster world, and they are to be eliminated quickly and on sight. Also, Inner Moka has stated that his transformation into a Ghoul has also marked him as dead.
Fortunately, Tsukune's life is spared and he is given a second chance. Tenmei Mikogami, the Academy's Chairman and an exorcist, provides a way to suppress his ghoul nature, allowing Tsukune's personality to return. With the help of a "Holy Lock" worn around his wrist, it acts in a similar fashion to Moka's rosario, sealing away his Ghoul powers and personality. Wearing it prevents him from using his powers, and keeps his human consciousness, if not his humanity, intact. However, the lock is not meant to fully seal away the ghoul personality, but to suppress it; Tsukune still carries its innate thirst for blood—more specifically, for Moka's—and is seen downing multiple bottles of water to control it. Even the sight of blood makes him momentarily lose control and attempt to bite her. However, Tsukune manages to control his thirst and has not consumed any blood or harmed Moka. Eventually, Tsukune learns to access his powers at will, though temporarily. Doing so causes one of the many links on the lock to fracture. Additionally, whenever he finds himself near death, the vampiric blood in his body automatically activates, causing all the links to break at the same time and reverting him back into a ghoul. Tsukune is able, if provoked, to turn into a vampire with a similar transformation to Moka's, but if he stays too long in this state, he will succumb and revert back to his ghoul state. Fortunately, Tsukune's ghoulish nature can still be stopped with the support of a monster seal barrier spell. Later on, per instruction from Mikogami, Ruby trains Tsukune to control his abilities using Belmont, a magical whip that unlocks a yōkai's full potential. Moka also teaches him to detect other yōkai that are close by, a sense that is only possessed by other vampires.