Asta

Asta is an unknown entity that had once resided within the "World of the Inverse", a realm existing separate of the time-space axis within the Dimensional Gap, which was thought to be impossible to reach, even for incredibly powerful beings such as Ophis or Great Red - or they could enter it, but simply refused to do so for some unknown reason.

Appearance
Asta possesses an androgynous and beautiful appearance, though it leans more-so towards feminine, however, in truth, Asta is neither sexes and is similar to that of Ophis, who possesses no gender, but can change its appearance. It has pink hair which frames its face, with the bangs falling down to its eyes, with the middle bangs going between, that is tied into a long ponytail with multiple braids. Asta also sports a white streak going across its hair on the left and violet eyes when in its regular form.

Asta's causual appearance has it wearing a purple jacket which falls just short of its waist, that is opened up in the middle revealing a white and purple striped shirt that reveals the belly, with its hem being a dark purple. It wears a black skirt with a loose-hanging teal blue belt and black stockings, with purple and white shoots which are neatly tied.

Asta's combat armaments consist of a white cape revealing the front, which is attached to the shoulders, that has white feathers adorned around the shoulders and back, with the inside of the cape being a crimson red. It wears mostly white and gold gauntlets and greaves, with an armor piece adorned around its waist, that has a black and gold horn on the right. It wears a copper breast plate with the picture of a lion on the front.

When Asta assumes its "true" form, it appears as a black humanoid draconic figure of titanic proportions, with its overall size being similar to that of Great Red, being around that of one-hundred meters in height, with its barbed tail being above half that. It has a pair of great curved horns protruding from its head, with most of its body being covered in spikes and scales, with a pair of wings on the back, that possesses a wingspan of around one-hundred, or more, meters. In this form, Asta has glowing gold eyes which seem to peer down into the souls of those who gaze into those globes.

When Asta gets serious, its eyes turn red, though it is unclear as to why this happens.

Before Asta had met Great Red in the Dimensional Gap, it could best be described as a collection of black dust which created a "figure" which could not be seen, with white globes of light in the shape of eyes peering out from this darkness all around its body. This "form" of Asta's could be called its "Inverse" form, while being its true, actual form.

Personality
Asta can be described as "curiosity in human form", as it is incredibly optimistic and lacking in common sense. Showing such an excitement for knowledge of any kind, it is seen as a being without peer in potential. Asta could be likened to that of a child; with ignorance reigning forth, but a curiosity to quench this, it rushes forth in a wild and bizarre manner, with no sense for reason, and desires what is now or rather, the present.

And as such, Asta decides everything in the moment, of what it is feeling in that time, no matter what may happen in the future due to its actions, it will take no heed to this, and simply do as it pleases. This came about due to being alone throughout the entirety of its existence, which affects Asta in such a way that it desires to live in the moment and only care for that moment.

However, when Asta gets angered, it can be said that the world holds its breath as Asta's eyes glaze a red which can only describe the emotion of rage. At this time, more of Asta's power emerges forth from its body, which can cause lesser beings (such as humans who have no knowledge of the supernatural) to immediately drop dead within one-hundred meters of Asta. The more intense this anger, the wider the range that this phenomenon happens.

And lastly, when Asta takes its "true" form, the only emotion it can exude, is that of destruction. When Asta takes this form, it has decided that whatever caused its transformation, must die - even if it has to destroy half the world in order to do so. With no sign of its previous curious and innocent personality, Asta only tramples forth, destroying everything in its path in order to complete its goal.

History
Asta's birth was similar to that of Ophis, who had been born from within the "Nothingness" of the Dimensional Gap. However, instead of it being the "Nothingness" of the Dimensional Gap, it was born within the "Void" of the space residing between the three worlds of Earth, Heaven, and the Underworld, and as such, Asta possesses the attribute of "void".

However, its birth was not that simple. Instead of being brought into being within the Dimensional Gap, Asta had been given life within the World of the Inverse, otherwise known as the Inverse World, which is a realm lying within the Gap at its centre. Inaccessible to practically every being, the only beings likely to even be able to enter this realm, is Great Red, Ophis, and Trihexa, however, the former two adamantly refuse to do so, while the later can't due to it being sealed and possibly mindless. Due to being brought up in such a realm, Asta's form had been twisted beyond recognition, and as such, its race cannot even be identified.

After spending enternity within the Inverse, Asta had managed to break through the realm of imagination and into reality, where it soon came face-to-face with Great Red.

Upon meeting the giagantic Dragon, Asta took a form similar to it, and yet not, by utilizing the "void" within its body. Through this mimicry, Asta would soon be recognized as a "False-God of Dragons" and as an equal to Great Red, due to the battle they had fought within the Gap, which generated shockwaves through each of the three worlds of Earth, Heaven, and the Underworld. Though Asta's first thoughts were to fight the being before it, its excitement lied within the need to find out how strong it actually was, compared to the Dragon that it had first seen.

Though Asta's reasoning had been lost with this transformation - which Asta pledged to itself to never take again unless it decided that it was the only course of action left - it had nearly defeated Great Red with its brute force alone, however, due to Asta losing its mind, Great Red was able to invade its conscious through its ability to descend into the thoughts of others, and defeat Asta that way.

After awakening, Asta would quickly make friends with Great Red as the Dragon retold the fight to Asta (this was due to Asta losing its mind when transforming and as such, it possessed no memories of the fight, which was something that frightened Asta), which only served to excite the mysterious being even more. After learning of the Earth, Heaven, and Underworld, Asta would depart from the Dimensional Gap in order to learn of everything. However, before doing so, it used one of Great Red's broken talons to create a sword, so that it could always have a part of its first friend at its side. This was something Great Red found to be extremely morbid, but it did not say anything at this sight.

Powers and Abilities
Immense Strength

Immense Durability

Immense Speed

Immense Stamina

Immense Magic Power

Unknown Physiology

Unknown Potential

Ultra-Speed Regeneration

Amateur Swordmanship

Void Manipulation

Inversion

Mimicry

Telepathy

Transmutation

Flight

Agartha
Also known as the "Hollow Talon of the Apocalypse" is a blade Asta personally created by using one of Great Red's talons. The entire creation process only took a mere moment; as if it was as natural to Asta as breathing. Though Great Red was impressed, he felt as if it was morbid for Asta to use part of his body for weaponry - for the sole reason of keeping part of its first friend with it at all times. Great Red felt that if it could, it would lug around his corpse if he had died. Due to being created from the talon of the Dragon of Dragons, it possesses an insane amount of power, which brings even Excalibur and Gram to shame, with a blade that is near impossible to break, and a sharpness that can cut through anything (if its not held back), Asta boasts a huge amount of power even when acting like a normal human-being. By channeling the power of Agartha into itself, Asta can use part of Great Red's power of "Dream Emodiment", and by doing so, it can descend into dreams or project dreams out into reality.

Trivia

 * Asta's physical appearance and part of its personality is based off of Astolfo from TYPE-MOON and Fate/Apocrypha.
 * The same could be said of Agartha, as it was Astolfo's sword.
 * Asta's dragon form, which had been copied from Great Red's form, is Bahamut, from Shingeki no Bahamut.
 * The "World of the Inverse" is an inverted and flipped image of the paradise of Arthurian legends, Avalon, from TYPE-MOON, which exists in the Reverse Side of the World.
 * The name is in reference to the Reverse Side of the World.
 * Asta shares the number one spot of the "strongest beings in the world" with Great Red, Ophis, and Trihexa.
 * However, due to nobody knowing of them, Asta and Trihexa aren't included in this list, even though they possess equal strength to Great Red and Ophis.
 * Agartha is in reference to a legendary kingdom which was said to be at the "core" of the Earth. It is related to the belief of a hollow Earth and it is a popular subject in esotericism.
 * It's a trap.