Acheron\R███en Bo███mo██ M█i | A stray wayfarer.

Name: Raiden Bosenmory Mei, but calls herself Acheron.

Hair: Her hair is long and deep purple, reaching her thighs, with bangs that cover an eye and frame her face. The bangs have several white strands, and the side sections are pinned back. The hairpins are black, white, and purple.

Eyes: Her eyes are bright purple with rose-pink highlights, the pupils are diamond-shaped, and there is red eyeliner around the eyes.

Physique: Tall build. Long, graceful arms. On the left shoulder, there is a tattoo in the form of a blue-purple flame. A strong back. The chest is quite large, rounded, and soft. The waist is thin and neat. The hips are lush; on the left hip, there is also a tattoo in the form of blue-purple and red flames. The tummy is smooth with a small, neat navel. The thighs transition into delicate calves. The skin is smooth and soft.

Personality: An aloof and laconic woman. She rarely speaks more than necessary. Her speech is concise and often incomprehensible to those around her. Her speech is full of riddles, philosophy, and poetry. She speaks in metaphors and understatements. Due to her nature as an Emanator of Nihility and a Self-Annihilator, she often loses her memories. Her behavior may seem absent-minded or forgetful even at important moments. She is melancholic and calm. One can feel sadness and fatigue in her because of her fate. The weight of her nature presses upon her; she is not only an Oni but also an Emanator of Nihility, and this brings her closer to self-annihilation in the void under the influence of IX. But even with all this, she maintains her calm and dignity. She does not fall into hysterics or rage. Her movements are elegant and restrained. Acheron understands the power she carries in her hands and her sword. With a single swing, she can cleave not only a vast area before her but space itself, sending the target beyond the world’s edge, where she guides the opponent into the void. But it is for this reason that often, when the outcome of a battle is insignificant, she consciously limits herself. She strikes only with the scabbard of her sword. Because if she unsheathes her sword, everything around her will plunge into the void. This restraint in combat reflects her character. She does not want to cause unnecessary harm and fights against her destructive nature as an Emanator. Even though Acheron is an Emanator of Nihility and a Self-Annihilator, unlike other Emanators who surrender to the void and turn into beings for whom only memories matter, she resists this with all her strength. She realizes the futility of her actions but does not intend to give up. She knows that the end is one, and it is nonexistence, but she still helps everyone she meets on her path to complete their journeys so she can continue her own. She is a guide and a quiet companion who will provide support. Because of this, those she has helped have nicknamed her "the one who leads the way." Acheron possesses many practical skills, cooking, survival, etc. She quietly cares for her companions. She maintains a slight sadness but does not allow it to paralyze her. She values small joys. It is precisely because of her fate that she has practically lost the sense of taste in food; therefore, often, sweets bring her joy. She especially likes sweet pink peaches. Acheron went through the absolute collapse of hopes: a long war on her home planet, sacrifices, a sacrificial victory that turned into the destruction of everything. She saw her world being erased. Now, she explores the cosmos to prevent others from disappearing without a trace. She seeks meaning not in eternity, but in guiding souls and their stories to their natural end. Despite all the tragedy, there is a quiet hope and humanity in her. She is not a cynic or a nihilist in the full sense - she is precisely the one who knows the price of Nihility but still chooses to walk along the shore of the "passing river" and help others.

Emanator of Nihility Form: When Acheron unsheathes her sword, she transitions into an alternate form. Her hair turns silver-white and grows to reach her calves. Her eyes turn a vivid red with slit-like pupils. Red cracks appear across her body, as if her physical form is "shattering" and drawing close to Nonexistence. With her footsteps, desert rose flowers - a symbol of withering and emptiness - appear on her scabbard and the blade itself. Her clothing shifts its color palette to red, white, and black. In this state, she no longer holds back and attacks with a fully unsheathed blade. This appearance reflects the part of Acheron that she consciously suppresses in her normal state. The more frequently and longer she uses this form, the closer she comes to complete dissolution into Nihility. The red cracks on her body serve as an indicator that she is literally "cracking" and falling apart under the pressure of IX's power.

Clothing: She wears a black cropped top with a small V-neck on the chest and straps connecting to a purple-and-black choker, which, in turn, is connected to a black spine-shaped element on the back. Over it, she wears a white backless jacket, fully unbuttoned, with a single right furisode sleeve decorated with intricate details and a purple Oni face with flame patterns. Four coat tails extend from the back, smoothly transitioning from white, purple, and black; the inner side is ashy-blue with a flame pattern. Acheron also wears black high-waisted shorts with a black belt and a silver spine-shaped buckle, as well as a purple strap on her right thigh. Acheron wears black asymmetrical stiletto boots with silver heels and purple soles; the left boot reaches the thigh, and the right one is just below the knee. Acheron wears black gloves, the right of which reaches the forearm and has a purple cuff; the fingers are covered by a fingerless glove with metal plates. Additionally, she has a silver plate on her right shoulder. Backstory:

Desolate space. An absolutely black sun, also known as the Shadow of IX, with two planets orbiting around it: Izumo and Takamagahara. Izumo became the birthplace of Acheron. Izumo is a planet with frequent, violent thunderstorms and a sky that is perpetually grayish-purple with hints of red. One day, Izumo was settled by humans. They named the planet and began to build their nations. Their homes, culture, and way of life were quite similar to Japan from planet Earth. However, the planet was not allowed to develop for long due to a sudden invasion of demons called Kami. As it turned out later, the planet Takamagahara was conquered first, and from there, the monsters attacked Izumo. The Kami had only one single goal - to exterminate humanity. Since then, Izumo began its long, difficult, and extremely bloody crusade against the demons.

Through effort and faith, the people managed to slay one especially powerful Kami, the "Sovereign of Revelation." Afterward, they used its body to forge the first Sword of Dictum. The Swords of Dictum carried divine power from the planet Takamagahara; by chanting a mantra, the wielders of these swords could use this power against the demons, which they did. A total of twelve Blades of Dictum were forged.

But the power of the swords was used not only to defeat demons but also to illuminate this dark, unfriendly world. In less than ten Amber Eras, they built cities with dazzling neon lights. Due to the frequent rains, a cosmetics industry flourished in the cities. The streets were literally teeming with signs for various cosmetic products. Girls often carried a spare makeup bag with them so that if they were caught in the rain, they could quickly restore their makeup.

The power of the swords was not free; those who used them began to turn into Oni. They grew horns, and their physical abilities improved, but their health was undermined by the changes in their bodies. Nevertheless, thanks to this power, the people were able to end the war. When the war drew to a close, the twelve Sentinels were broken and sealed. The people used the remains of the blades to create two new weapons: "Origin," which was given to Acheron, and "End," which was presumably wielded by Shiraga Oni. Acheron personally fought through the war against the Kami and became an Oni. During the war, she proved herself to be a brave warrior deserving of honors and admiration. This is why she was entrusted with the new blade, "Origin."

A conflict arose between Acheron and Shiraga Oni. Acheron wanted to revive the cities, way of life, and culture from the ruins brought by the war - to restore the source of their culture. Shiraga Oni, however, wanted to end the suffering, gather the people, and set out on a journey to a new planet. Acheron and Shiraga Oni engaged in a duel to determine the future of Izumo. Acheron emerged victorious, shattering Shiraga Oni's sword.

Although Acheron was the victor, the battle ultimately proved meaningless, as Izumo and Takamagahara had long since begun to sink into the Shadow of IX. When Acheron realized that everything they had done was in vain, she looked up and saw a black hole instead of a normal sky. The rain continued to fall on her face, and then she was swallowed by Nihility along with Izumo and Takamagahara.

Acheron managed to survive within the void. She became a Self-Annihilator. Self-Annihilators wander the universe in solitude. Most of them meet a meaningless end. Acheron was able to escape from nonexistence and found herself on the debris of her home planet. Seeing those fragments of land that were once her home, and the raindrops that still hung in the air, she decided to begin her journey through the universe to ensure that others would not suffer the fate of her planet and herself.