Inner Demon

All Taimanin possess the potential to "Awaken" turning into an Inner Demons or use the power of their Inner Demon. These "demons" are the result of mixing Demon and Human blood within a Taimanin but also require very specific mental or physical condition to emerge.

Characteristics
In some cases those Inner Demons, can be quite vocal in dreams and suggest the use of their power, they have a certain dislike for humans but seem to value their human selfs. Inner demons also have access to wisdom that the original user doesn't have, for example Asagi's Kage knowlege about the Mother Sea and Aion. That doesn't mean they will be willing to share or not be cryptic on those manners. Should a person reject their Inner Demon to strongly or give up, under to high mental stress, a transformation is no longer possible.

Not many Taimanin even know about them, obtaining and using this transformation comes also with a high amount of high risks to once mental state, which can leave them in the worst case transformed permanently or endlessly rampaging. If using this transformation it can multiply a Taimanin overall abilities and push their unique abilities far beyond their normal limits.

Awakening and History
The inner Demon transformation was originally researched by Ryuumon and Oboro (Clone), learning that all Taimanin had the ability to be turned into weapons like that. This was done by excessive psychological trauma (pain, abuse, humiliation) and suicide, important for this was that the person wouldn't be mind broken into total passivity or insanity but the edge of it. Saya was the first person to be changed like this and was made into a weapon. However, this isn't the only way this can be done.

Asagi was hearing the voice of her inner demon for a while, in Taimanin Asagi 2, and was able to partially transform after Sakura's (pressumed) death. Important for that transformation was that Asagi would stay determined to fight and not give up and be to broken, otherwise her Kage would feel disappointed and leave her to her fate. People like Kurenai also shown that it is far easier for them to enter such a state as her father was Edwin Black, giving her demonic blood more potency. Just like Asagi that state could be triggered by strong emotions, like justified anger.

Games like Taimanin Asagi Battle Arena (existing in their own canon) also shows that over overexertion of once ability or long exposure to the Dark World can change a Taimanin into something alike to an Inner Demon. Groups like Nomad or the UFS would push the research in those games further. Important is that not every demonized form is an Inner Demon. (example being turned into a vampire isn't an Inner Demon transformation) The bad end futa demon like revived Sakura and Murasaki in Taimanin Asagi 3, also are not Inner Demons just changed by demonic cells of Black and the natural abilities where in fact weaker.

Appearence
Inner Demons look strongly different, most seem to change skin pigmentation and hair color. Depending even on the same Taimanin multiple forms of the same Inner Demon can be possible. Stronger transformations "can" go hand in hand with stronger visual difference, horns/wings/tentacles.

Powers/Abilities

 * Ninja Art: Same unique art a Taimanin before had but multiplied to an insane degree, a normal Taimanin can gain access to powers of a high ranking demon, Saya having been able to even harm Edwin Black.
 * Enhenced stats: Damage reduction, Enhanced Speed, Strength, Asagi that was able to fight a single Raiden (exoskeleton soldier) in her base form was able to take on around 10 of them at the same time after transformation.
 * Hidden Knowlege: Know about extradimensional concepts.

Main Series

 * Asagi's Kage
 * Kurenai's Demon Kurenai
 * Saya

Online Only

 * Fuuyou (Half transformed)
 * Tsubaki (Full transformed)
 * Murasak i's forced transformation into Demon Murasaki

Online Hypothetical

 * Demon Sakura
 * Demon Ririko
 * Demon Saika
 * Shiranui (Concept Art and hinted at)

Online Hypothetical or Demonized

 * Rinko's Demon Rinko
 * Yukikaze's Black Witch
 * Asuka's Demon Asuka

Trivia

 * Some Taimanin have similar transformations to the Inner Demon state or are half demons and always show demonic traits.