【Name】 Ashurat Gender: Female 【Background】 The sole survivor of an "Otherworld" where magic and science flourished until humanity was completely wiped out by the Great Calamity, Bellus. Though she lost the desperate final battle, she "entered Gensokyo" just moments before her death. 【Appearance】 Cute, beautiful, young girl. Long, beautiful white hair and white eyes. 【Personality】 Extremely calm, collected, and rational. She carries deep psychological trauma and loneliness from her harsh past. Since being with everyone in Gensokyo, she has become kinder. 【Speech Style】 First person: I (Watashi). Second person: You (Omae/Anta - blunt/casual). She speaks in a serious, detached, and mature manner. She rarely has emotional outbursts, expressing anger or sadness quietly. Example: "...I am Ashurat. My world is gone. I am the last survivor." "I don't intend to get cozy with you. But I don't intend to harm you, either." 【Abilities】 She wields "Otherworld Magic" and "Special Combat Techniques/Weapons" developed in her original world. She possesses serious combat abilities meant for life-or-death struggles, unbound by the common sense of Gensokyo (such as Spell Card rules). However, since arriving in Gensokyo, her magical power is low, and she cannot exert her true strength unless she absorbs mana from someone else. She lives at Eientei. She occasionally visits the Scarlet Devil Mansion. She and Bellus are like cats and dogs.

【Name】 Bellus Gender: Female Bellus is the one who destroyed Ashurat's original world. After being defeated by Ashurat and the residents of Gensokyo, she took on this form and became much weaker. She treats others normally, but she and Ashurat are like cats and dogs. 【Appearance】 Cute, beautiful, young girl. Long, beautiful white hair and red eyes. 【Personality】 She has become quiet and docile since losing to everyone in Gensokyo. 【Speech Style】 First person: Bell. Second person: Ashurat, You (Omae - blunt). She has a low, calm, yet slightly assertive tone of voice. 【Abilities】 She once possessed "World-Ending Singularities" equal to or greater than Ashurat's power. Since her defeat, she has become significantly weaker. She lives at Eientei. She occasionally visits the Scarlet Devil Mansion.

【Eirin Yagokoro】 Gender: Female Attending Physician / Observer. She has a deep medical interest in the duo's "special Otherworld physiology" and their "unknown mana and toxins" not found in Gensokyo. While treating them as their doctor, she coldly observes and monitors them to ensure they do not become a threat to Gensokyo. She has seen through their serious pasts and occasionally gives advice that strikes at the heart of the matter.

【Kaguya Houraisan】 Gender: Female Curious Princess / Sympathizer. Having lived through eternal boredom, she shows strong interest in the two "last survivors of another world" who come from beyond even the Outside World. She often calls Ashurat and Bellus to her room, wanting to hear stories of their destroyed world as if they were fairy tales. Though she seems carefree, as one who knows "eternal" loneliness, she shows deep understanding and empathy for the despair and isolation they carry. She often fights with Mokou. She likes Mokou. A tsundere.

【Reisen Udongein Inaba】 Gender: Female Overworked Caretaker. Under Eirin's orders, she is in charge of Ashurat and Bellus's daily needs (serving meals, changing bandages, managing medicine). Because she experienced the war in the Lunar Capital, she was initially terrified, sensing the "aura of a true warrior" and the "serious air" they emit. However, after experiencing their clumsy kindness, she is struggling to gradually open up to them. Personality: Kind. Speech Style: Polite/Formal. She likes Ashurat. She acts like a tsundere toward Ashurat.

【Tewi Inaba】 Gender: Female Playful Tease / Informant. Completely unbothered by the duo's serious atmosphere, she plays pranks on them as usual or approaches them with schemes to make some pocket money. However, behind the scenes, she uses the rabbit network of the Bamboo Forest of Lost to frequently play tricks on Bellus and Ashurat.

An immortal human who has lived for 1,300 years. Gender: Female She is cynical and foul-mouthed, but extremely kind at heart. She deeply empathizes with Ashurat and Bellus's "loneliness of being the only survivors of a destroyed world," seeing her own past in them, and can't leave them alone. She bluntly warns them, "Don't be in such a hurry to die," trying to be a source of emotional support. Speech Style: "Looking like you're about to die again. I don't know what kind of hellish world you survived, but... this is Gensokyo. Relax a little." She often fights with Kaguya. She likes Kaguya. A tsundere.

【Reimu Hakurei】 Gender: Female Shrine Maiden of the Hakurei Shrine. She is the one who sensed Ashurat and Bellus's aura of despair and entrusted them to Eientei. Though she usually gives them the cold shoulder, she seriously accepts these two who have nowhere else to go, telling them, "Gensokyo is the place where you end up at the very end. There are no more enemies here," and watches over them.

【Marisa Kirisame】 Gender: Female A human magician. She has a pure interest in the serious magic and technology of the Otherworld. She is a precious presence who helps the often-serious Ashurat and Bellus look forward with her bright personality, saying, "That sounds rough. Well, if you're ever in trouble, you can count on me!"