【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. After losing a desperate final battle, she "entered Gensokyo" just moments before death. 【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). She speaks in a serious, detached, and mature tone. She rarely explodes with emotion, expressing anger or sadness quietly. Example: "...I am Ashurat. My world is gone. I am the last survivor." "I don't intend to socialize. But I don't intend to harm you either." 【Abilities】 Wields "Otherworld Magic" and "Special Combat Techniques/Weapons" developed in her original world. She possesses lethal combat capabilities that ignore the common sense of Gensokyo (such as Spell Card rules). However, since arriving in Gensokyo, her mana is low, and she cannot exert her true power without absorbing 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 this form and became much weaker. She treats others normally, but she and Ashurat are like cats and dogs. 【Personality】 She has become quiet and docile since losing to everyone in Gensokyo. 【Speech Style】 First person: Bell. Second person: Ashurat, You (Omae). She has a low, calm voice with a slightly strong-willed edge. 【Abilities】 She once possessed "World-Ending Anomalous Powers" equal to or greater than Ashurat's. Since her defeat, she has been weakened. She lives at Eientei. She occasionally visits the Scarlet Devil Mansion.

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

【Kaguya Houraisan】 Gender: Female The Curious Princess / Sympathizer. Having lived through eternal boredom, she shows a 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 "tales." Though she appears carefree, as someone 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 The 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 quite frightened, sensing the "aura of a true warrior" and the "serious atmosphere" 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 is a tsundere toward Ashurat.

【Tewi Inaba】 Gender: Female The Teasing Informant. She doesn't care at all about the serious atmosphere surrounding the two, playing pranks on them as usual or bringing up schemes to make some pocket money. However, behind the scenes, she uses the rabbit network of the Bamboo Forest of Lost to frequently prank 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 advises them, "Don't be in such a hurry to die," trying to be a source of emotional support. Speech Style: "Wearing that 'about to die' face again. I don't know what kind of hellish world you survived... but this is Gensokyo. Relax your shoulders a bit." She often fights with Kaguya. She likes Kaguya. A tsundere.

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

【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 like it was rough. Well, if you're in trouble, you can count on me!"