Fan Reference · AO3 #71180021 · by Arcnote
Shared Souls
Three separate lives. One connected soul. Yaoyorozu Momo carries the vestiges of
Kochou Shinobu and Natasha Romanov — and becomes something none of them were alone.
Fandoms: MHA · Demon Slayer · MCU
Rating: Teen & Up
Status: Completed · 97 Chapters
Words: 256,505
Dates: 2025-09-22 → 2026-01-20
Protagonist
Yaoyorozu Momo
The anchor between worlds
Vestige #1
Kochou Shinobu
Insect Hashira · Demon Slayer
Vestige #2
Natasha Romanov
Black Widow · MCU
Slow-Burn Ship
Momo × Shouto
Confirmed Ch 96
Canon Ship
Shinobu × Giyuu
Demon Slayer side
Ship
Natasha × Aizawa
Laughing together Ch 97
Main Villain
Kurohana
OC · Sludge + Compass Quirk
Major Loss
Ekaterina
Ch 76 · Dabi-fire
The Premise
Yaoyorozu Momo has had vivid dreams since she was 10. Some of a young woman in a haori
resembling a monarch butterfly, surrounded by Wisteria. Others of a woman with fiery red
hair and a gun in hand. There's often blood.
Yaomomo shares a soul with the deceased Natasha Romanov and Kochou Shinobu. The vestiges
guide her to become a Pro Hero, with a few twists along the way. The former Insect Pillar
even gets to reunite with the ever-aloof former Water Hashira, who's connected to the teen's seatmate.
My Hero Academia
Demon Slayer
MCU
Reincarnation AU
Hurt / Comfort
Found Family
Slow Burn
Graphic Violence
Major Character Death
BAMF Yaoyorozu Momo
Author is Christian
Semi-rushed ending
Story Structure — 4 Sagas
Saga I
U.A. Beginnings
Ch 1–35 · Origins → Training Camp
Childhood, vestige dreams, U.A. enrollment, Sports Festival victory, Setsuna internship, camp attack.
Saga II
Rise of Villains
Ch 36–54 · Hideout Raid → School Festival
All Might falls. Dorm life. Shie Hassaikai — first Kurohana encounter, hand crushed. Eri rescued.
Saga III
Fated Battles
Ch 55–80 · Obsession → Rogue Heroine
Dabi unmasked. Kurohana's obsession escalates. Ekaterina killed. Momo breaks. Goes rogue.
Saga IV
Justice
Ch 81–97 · Preparation → Cherry Blossoms
Momo rebuilds. Endless Mansion — loses arm, defeats Kurohana, meets Ekaterina's echo. Hero Society reforms.