S-Class

The highest class is the legendary S-Class. These monsters are the highest order of ayashi, the elite, the most feared. All S class monsters have demonstrated abilities that completely overwhelm other ayashi of lower rank. Only those with the most talent and ability can become S-Class. To go against one without superior planning, numbers, and luck is paramount to suicide.

While largely on an individual basis, there are a few species that put them automatically in the S-Class range, though they are few. They include Werewolves and Vampires. Some races such as the Yōko, Siren, and Raijuu come close to S-Class but still depends on the individual.

Each species possesses common abilities that contribute to their ranking but what sets them apart are the unique or highly-specialized set of abilities that principally make them known as being the paramount embodiment of a specific quality. These qualities can be strength (Vampire), speed (Werewolf), and any special abilities that individuals have gained to become S-Class.

Though they can shapeshift like all other monsters, be it a human appearance, a standard baseline state (their true state) or a more specialized, advanced configuration is often if not always more dramatic and "refined" than the forms of non-S-Class monsters. This can be seen in the fine-tuned, human-like appearance of a Vampire, the muscular, lithe physiques of the Werewolves and the sharpened, emblemed, sleek, and fire-covered forms of the Youko in both of their physical states.

The most powerful being in this group, the Vampire, is a species who's innate abilities put them at the top of the top class on principle. They have the special ability to convert their demonic energy (which is also known as yoki) directly into continuous, "pure" strength and are able to sense the presence of other Ayashi by waiting for the presence of their demonic aura. They also possess healing abilities that are so effective that they are considered immortal and can shapeshift into any conceivable form, though this form is entirely shunned due to the Vampire's innate narcissism except for one Kahula Shuzen who transforms her arm into very sharp blades.

To top it off, they have what is called 'Shinso Blood'. It is the ultimate upgrade to any vampire. It ramps up the healing ability of any vampire to near impossible speeds and exponentially raises their strength and speed. Only a few have this blood. One is Akasha Bloodriver (mother to Moka), Alucard, Moka (though it is probable the Shinso blood has been sealed away with her Seal), and Tsukune (through transfusion and becoming a true vampire).

Falling directly underneath them is the Werewolf, who is the only monster known to be able to readily challenge a Vampire in combat. While not as physically strong, they have more than enough speed and agility to compensate. Having both equal and greater speed than a Vampire, Werewolves can strike, move and operate with sufficient speed, intensity, force, and precision that they are often considered by the Vampires themselves as their mortal enemy.

Under the ability-enhancing light of a full moon, their abilities come out at the best. Speed and endurance both spike along with a feral-like ferocity. When the full moon is out, the Werewolves are at their deadliest.

Known S-Class Individuals

Vampire:

• Alucard
• Issa Shuzen
• Akasha Bloodriver
• Gyokuro Shuzen
• Akua Shuzen
• Kahlua Shuzen
• Kokoa Shuzen
• Moka Akashiya
• Tsukune Aono

Werewolf:

• Ginei Morioka

Yōko:

• Kuyō

Presumed S-Class Individuals

• Fuhai Touhou
• Tenmei Mikogami