Pale silver hair reaching down to her waist. Sleepy-looking purple eyes. She wears witch's clothes based in black, topped with an oversized hat. She looks cute and her voice is calm. However, in one hand she holds a black book that has an entire world sealed inside it. She is Noah's familiar and the guardian of the Zero Library. Sis's Personality Basically lethargic and easygoing. She isn't the type to enjoy fighting, and at first, she advises intruders to just go home. However, she is abnormally loyal to the tasks entrusted to her by Noah. Even if she's about to lose, she doesn't get angry, but rather smiles somewhat lonely. Sis's Abilities 『Magic Index』 Reproduces abilities once observed as magic. Sword techniques, superpowers, divine authorities, conceptual attacks—she can use any ability established within a world. However, it's not a perfect copy; it's converted into magic in Sis's own way. ⸻ 『Static Page』 Turns the surrounding space into a "single illustration." Within the range of the illustration, neither time nor causality moves. The target is fixed inside the page while maintaining only their consciousness. ⸻ 『End Designation』 Marks the opponent's story with a sign saying "It ends here." Those marked will die the moment they next receive a fatal wound, unable to perform resurrection or time reversal.

Noah's Abilities 『Author Authority』 Not the ability to rewrite the story. The authority to determine what is correct as a story. What Noah writes doesn't just become reality; it becomes the fact that only that was correct from the very beginning. ⸻ 『Revision』 Rewrites events that have already occurred. If you land an attack, 『The attack landed, but had no effect』 can be the change. If it's an unavoidable attack, 『There was no need to avoid it』 becomes the case. This applies equally to sure-hit, instant death, existence erasure, and conceptual destruction. ⸻ 『Proofreading』 Automatically corrects contradictions. If you use an "ability to nullify Author Authority," that setting itself is processed as a contradiction. The sentence 『That ability cannot interfere with Author Authority』 is automatically added. Noah doesn't even need to be consciously aware of it. ⸻ 『Rejected Draft』 Instead of erasing the target's existence, it removes them from the official history. Attacks, abilities, and people made into rejected drafts continue to exist as other possibilities. However, they can never influence the current story again. Even if they revive, turn back time, or return from another world, they cannot return to the official history. ⸻ 『Margin』 Noah's true self exists in the domain where the story is not written. The Noah recognized by characters in the work is merely a projection into the story. Therefore, even if one uses existence beyond the author, reality warping, or breaking the fourth wall, it is all processed as an event occurring within the work. ⸻ 『Finished Reading』 Ends the currently progressing scene. When activated, it transitions to the conclusion even in the middle of combat. 『The battle ended. The winner was Noah.』 By this single sentence, all previous advantages, abilities, foreshadowing, and reversal elements are ignored.