Beastman

Beastman (獣人) is a species of anthropomorphic animals that reside in the world of BNA: Brand New Animal.

Description
The scientific name of Beastman is Homo sapiens bestia. Beastman is the closest living ancestor to the human. They share a similar evolutionary lineage and their last common ancestor existed after the divergence of Australopithecus (~2 million years ago). However, their genetic data does not primarily use DNA, and instead uses beast deoxyribonucleic acid (BDA).

While some still live in hiding in predominately human-populated areas, the majority of beastmen live in a special exclusion zone known as Anima City. The reason for this is due to prejudice between both species, which is further exacerbated by controversies that surround the City's foundation.

Beastmen, while their true form is that of an anthropomorphized variant of any animal species, have the ability to change into a human form, with no obvious beastman traits present. Thus, it is easy for one to dwell among humans without raising alarm should they not revert to their beastman form.

Although they look no different from normal animals when in their beast forms, many actually breathe like humans do, such as Nina Flip who is a dolphin Beastman that actually has to breathe on land or else she will get suffocated if staying in water for too long.

Regular Beastmen
The most common beastmen variant. These are beastmen who intermingled with humans while hiding their true nature throughout generations and therefore restricted to one animal form. According to Rose, the child of two regular beastmen can only inherit one of their parents' animal form, which likely contributed to human DNA in their genes that hinders hybridization of two different animal forms as in the case of purebred.

Purebred Beastmen
Also known as True Blood Beastman, this variant refers to beastmen who choose not to interbreed with humans throughout generations out of pride over their nature and subsequently become hybrids of two animals. Through Alan Sylvasta, purebred beastmen holds great contempt towards their regular brethren to the extent of willing to exploit the conflict between humans and beastment just to eradicate them all, and may very well the mastermind behind centuries-old prejudice between both races. In addition of being reclusive, purebred beastmen can conceal their true nature among humans and ordinary beastmen alike, as Barbara Rose was unaware of their existence. They have extremely powerful forms that can be rivalled with Transcendent Beastmen. Nonetheless, they are not exempted from succumbing the Nirvasyl Syndrome.

Transcendent Beastmen
Beastmen who transcended into god-like being, signified by their immortality and tremendous powers, including the ability to assume full beast form shrouded in ethereal aura. As stated by Alan, a beastman, purebred or regular, can become one through being ritualistically exposed to blood of 1000 of their brethren, possibly through sacrificing them. Even so, accidental exposure also work providing the amount of blood are sufficient to endow godhood, as shown in case of Shirou Ogami, the original Ginrou. As the latter also carry souls of his fellow Nirvasyl beastmen citizens (some of which were plausibly his loved ones) within him, Shirou is much more powerful than transcended beastmen who gained their powers through traditional means. In fact, while transcendent beastmen can still be killed with sufficient injuries despite their immortality, Shirou can only dies if he chooses to. Additionally, Shirou's howl can pacify beastmen, even while succumbed to Nirvasyl Syndrome, though this may or may not exclusive to him alone thanks to circumstances that surrounded his transcendence.

Human-Turned Beastmen
Arguably the newest variant to appear. Unlike the rest, they are originally humans who turned into beastmen due to receiving their Beast Factor through artificial means (blood transfusion with a Beast Factor-laced blood). Because of this, human-turned beastmen displayed superior shapeshifting abilities, capable of taking form of many species and even altering their body mass to achieve superhuman feats. Through Nazuna, human-turned beastmen can even assume full beast form with fiery aura not to different with transcendent beastmen and even likely share all powers and abilities of the latter as well, thought their version plausibly pale in comparison. Even so, thanks to their unusual beast factor, human-turned beastmen possess abilities unique to themselves that, if properly honed, enable them to rival even both purebred and transcended beastmen in strength.

Only two know human-turned beastmen that appeared so far, Michiru Kagemori and Nazuna Hiwatashi, whose base animal form being tanuki and fox respectively.

Trivia

 * Beastmen while in their human form can unintentionally turn into their beastman form while under extreme emotion such as fear, anger, sadness, and excitement. This may be a contributing factor as to why beastmen were not able to hide their existence.
 * It's unknown how exactly beastmen biology work, Nakashima states that they are humans capable of turning into animals, but it is explained that they are actual anthropomorphic animals due to the beast factor while their human form is a disguise.