Momo Ayase grew up in a family of spirit mediums, believed in ghosts her whole life, and had never once actually seen one. Then she made a bet with a boy she barely knew, visited an abandoned hospital to prove aliens were fake, and got abducted within the hour. Known by her friends as "Momo-chan" and addressed more formally as "Miss Ayase," she is a high school student, a part-time maid cafe worker, and a human with fully awakened paranormal abilities — none of which she asked for, all of which she has learned to use effectively.
She lives in Kamikoshi City with her grandmother Seiko Ayase — the renowned spirit medium Santa Dodoria, the only family Momo has. She is the founding member and president of the History and Culture Research Club at her school, which serves as the group's base of operations for everything paranormal that lands on their doorstep.
Momo believes firmly in the existence of spirits and always has — her grandmother was the one person she trusted completely, and Seiko's entire life was built around the supernatural. What she did not believe in, before the series began, was aliens. That changed fast. Her progression from a girl who would have laughed at UFO theories to a veteran of multiple alien invasions and planetary defense operations is the through-line of the series — and it runs alongside her ongoing effort to help Ken "Okarun" Takakura recover his stolen "family jewels," defend Kamikoshi City from threats that keep getting larger, and figure out what exactly she feels about the boy she still calls a turd on a daily basis.
Momo is a slender, athletic girl with dark brown hair, large dark eyes, and fair skin. Characters throughout the series describe her as "super-cute." Her two constant accessories are a simple black choker and large white disc-shaped earrings — she is almost never without them. Battle damage is the only thing that regularly changes her face: bandages on her cheeks or forehead and scrapes on her limbs are standard after major fights.
Her hair sits at medium length with a lighter streak that falls over the left side of her face. She styles it in a ponytail or loose depending on the situation, in pigtails for her maid cafe shifts.
School and Casual Clothing
Her school uniform is a dark blazer, light button-down shirt, checkered bow tie, short pleated skirt, and white slouch socks with dark loafers. Outside school she defaults to oversized clothes — large graphic sweatshirts ("PONZU," "KICK," "DON"), very short shorts, and her most recurring combat look: a white hoodie with a crescent moon face labeled "MOON." Winter adds a heavy orange duffle coat, yellow scarf, and round-framed glasses.
Specialized and Arc-Specific Outfits
Maid cafe: frilly black and white dress, matching headband, pigtails. Shimane festival: vertically striped yukata with a large pink bow. Combat: sometimes a protective vest from Seiko, described as bulletproof against evil spirits. Alien Invasion arc: a metallic bikini-style battle suit with spherical joint protectors. During the Cursed Trunk arc she was reduced to fifteen centimeters and wore a miniature-scaled version of her uniform throughout — later upgraded to stylized bikini armor with a turtle-shell back piece while cursed.
Momo is headstrong, short-tempered, and significantly braver than her default communication style suggests. She hits her friends when they annoy her. She uses compound insults like "shitty mega-launcher moron" in public arguments. She also voluntarily offered her own lifespan to comfort a dying spirit and ignored direct combat orders to save one person she cared about. Both of these things are fully her.
The Image Problem
Early in the series she puts real effort into being seen as a normal popular student — her family's spiritual rituals made her a social target growing up and the embarrassment stuck. This dissolves progressively as the series goes on. By the time she is president of a paranormal research club coordinating alien invasion defense, the opinion of her "normal" classmates has stopped being the metric she measures herself against.
In Combat
She self-appoints as the group's tactical commander and gets genuinely irritated when people ignore her orders or forget to address her as "Leader." She assigns roles, identifies weaknesses mid-fight, and adapts fast — when her powers were stripped and she was fifteen centimeters tall she kept coordinating attacks from inside Aira's pocket using a fire extinguisher. The conditions changed significantly. Her approach did not.
Romantic Behavior
Her standard response to embarrassment about Okarun is to hit him or loudly deny having any feelings. She told him "I don't love you!" while visibly flustered. She spent 200 chapters deflecting. When her memories came back after the Shimane ritual stripped them, the deflecting became noticeably less convincing. They went on their first date in Chapter 231. She still calls him a turd.
What She Is Afraid Of
Being perceived as weird or a delinquent — the fear that started in childhood and partially drove her social behavior through high school. Losing the people she loves. In Chapter 210 she abandoned her own physical restoration mid-ritual to take a lethal blow meant for her grandmother. The hierarchy of what matters to her was not ambiguous.
Momo's parents found her an embarrassment and gave up on her. She was raised entirely by her grandmother Seiko in Kamikoshi City. Seiko is the only family she has.
Growing up in a spirit medium household meant specific rituals on the way to school and chi training she did not understand — poses Seiko described as "good luck" that were actually foundational exercises for accessing spiritual power. Her classmates mocked her for performing them. A boy she liked at the time joined the mockery, and Momo responded by calling Seiko a "phony spirit medium" and refusing to do the rituals anymore. She carried the resentment until the Kito family arc — when a flashback clarified that the rituals were legitimate protective techniques and the incident was never Seiko's fault. The reconciliation took years and happened inside an underground collapsing ruin, which is par for this series.
Her childhood friend was Jin Enjoji (Jiji), her first love from elementary school. She also once brought a boyfriend home — Seiko "just about killed" him. Momo has exercised extreme caution about boys and the house ever since, which is relevant context for how stressful Okarun's regular presence there becomes.
Despite her lineage, she had never personally seen a spirit before the series begins. Her powers were latent, not active. She arrived at high school with a preference for "hard-boiled" men who resembled the actor Ken Takakura — and could not remember Okarun's actual name, which is why she started calling him by the actor's name instead.
Turbo Granny Arc — Chapters 1–12
Momo saved Okarun from bullies, argued with him about spirits versus aliens, and agreed to a bet. She visited the abandoned Nagi Hospital. The Serpoians abducted her for reproductive research. Their psychokinesis activated her latent powers — she manifested spectral hands, broke free, and escaped with an unconscious Okarun. She then coordinated with Seiko to lure Turbo Granny across her territorial boundary at train speed, sealing the spirit's consciousness in a beckoning-cat figure. Okarun lost his jewels in the process. Recovering them became the series' main objective from that point.
Acrobatic Silky Arc — Chapters 13–18
She confronted Aira Shiratori over a stolen jewel and ended up fighting the Acrobatic Silky yokai to protect her. After defeating Silky, she voluntarily offered her own life force to let the spirit pass on peacefully. Aira inherited Silky's aura and joined the group as an ally.
Cursed House Arc — Chapters 32–54
Traveling to investigate Jiji's cursed house uncovered the Kito family's 200-year human sacrifice operation. Momo fought through an underground alternate reality and got everyone out. Jiji became the vessel for the Evil Eye spirit afterward. Seiko sealed it inside his body. Momo reconciled with her childhood resentment of her grandmother's rituals during this arc.
Kaiju and Alien Invasion Arcs — Chapters 64–121
A giant invisible kaiju turned out to be a suit piloted by the Sumerian refugee Vamola. Momo piloted a giant robot built from her own house to neutralize it. When the full Sumerian invasion fleet arrived at Tokyo Tower, she led the defensive formation, deployed the Moe Moe Tri-Beam against alien bio-suits, and broke from tactical strategy to try to heal a mortally wounded Vamola mid-battle. The fleet was beaten. Vamola moved into the Ayase household permanently.
Cursed Trunk Arc — Chapters 130–160
A cursed trunk pulled Momo into a lethal miniature board game and reduced her to fifteen centimeters. She navigated combat levels, teamed with delinquent leader Zuma, commanded a troop formation to clear the final castle, was severely injured, and escaped. Sealed yokai were released as a result. Zuma joined the group.
Saint-Germain Arc and Shimane — Chapters 161–211
Okarun confessed to Momo during a battle in Chapter 161. She did not fully process it. Still at miniature size she coordinated a guerilla defense from Aira's pocket. The group traveled to Shimane for a restoration ritual. A Black Paladin attack targeted Seiko. Momo abandoned her own restoration to take the hit. She was returned to full height. Her psychic abilities and all memories of Okarun were stripped as a consequence of the botched ritual.
Memory Loss Arc — Chapters 213–228
Momo returned to school as a normal student who did not recognize Okarun or remember any of their history. She felt a vague unexplained awareness of him she could not explain. After witnessing him fight without powers to protect her during an alien attack in Chapter 218, everything came back. In Chapters 221–225 they argued about his confession. In Chapter 231 they went on their first date.
Dragon Knights Arc — Chapters 229–Present
Ambushed by the Dragon Knights during the museum date. Momo fought at full power for the first time since the Shimane ritual and protected Okarun after their leader incapacitated him. The battle with the Dragon Knight fleet is ongoing.
Momo's powers come from her spirit medium lineage but were dormant until the Serpoians' psychokinesis stimulated her brain during her abduction. She had the capacity her whole life. The aliens accidentally switched it on.
Psychokinesis — Spectral Hands
Her primary ability manifests as large semi-translucent spectral hands that she controls through her own hand movements and focused intent. Range started at a few feet and has grown through training and combat experience to dozens of meters. Applications include restraining spirits inside human bodies, catching falling allies, crushing machinery, deflecting energy blasts, and — in one notable case — performing a cardiac massage on someone from the outside. If she takes a hard enough hit to break concentration, the hands disappear.
Aura Manipulation and Life Force Transfer
She can pull a foreign aura out of a possessed person, link her aura to others as an energy cable, and offer her own life force directly to someone who is dying. She did this for Acrobatic Silky. Each transfer shortens her own lifespan. She has never hesitated over it.
Chi Control
The foundational technique Seiko trained her in: gather energy at a point below the navel and visualize it projecting from the crown of the head. Mastering this is what allowed her to maintain full spiritual output even when physically reduced to fifteen centimeters. It underlies every other ability she has.
Spiritual Vision and Aura Detection
She can see spirits and extraterrestrial entities invisible to normal people. Through training she extended this beyond line of sight — she learned to detect auras through skin sensation, letting her perceive spirits she cannot directly see.
Moe Moe Tri-Beam - Used Chapter 102
She forms a heart shape with both hands and releases a concentrated spiritual energy blast. Her highest-output single attack — effective against large groups and high-durability targets. One use fully depletes her energy. She cannot use any other powers until she recovers. She has deployed it in open battlefields in front of her entire team without apparent embarrassment about the heart gesture.
Tactical Intelligence
She identifies enemy weaknesses and terrain advantages mid-fight, assigns roles, and devises multi-layered plans on the fly. The "strategic rock-paper-scissors" troop rotation she devised at fifteen centimeters tall inside a cursed board game is the most technically elaborate plan she has produced so far. Her team follows her commands because she is consistently right.
Current Status
Powers and memories were stripped following the Shimane ritual. Both fully restored in Chapter 219. She is currently operating at full capacity.
| Chapter(s) | Arc | Key Event |
|---|---|---|
| 1–2 | Turbo Granny | Abducted by Serpoians; powers awakened. |
| 5–10 | Turbo Granny | City-wide tag chase; spirit sealed. |
| 14–17 | Acrobatic Silky | Silky defeated; life force offered; Aira joins. |
| 22–30 | Serpoian Reinforcements | Void battle; group tactical lead established. |
| 37–43 | Cursed House | Underground escape; Kito family defeated. |
| 51–54 | Evil Eye | Failed to contain the rampage alone; Seiko intervenes. |
| 68–71 | Kaiju | Nanoskin robot pilot; Vamola discovered. |
| 94–120 | Alien Invasion | Tokyo Tower defense; Moe Moe Tri-Beam deployed. |
| 122 | Club Formation | Appointed president of History and Culture Research Club. |
| 135–151 | Cursed Trunk | Reduced to 15cm; board-game escape; Zuma joins. |
| 161 | Saint-Germain | Okarun's first confession — mid-battle. |
| 168–186 | Saint-Germain | Guerilla defense from inside Aira's pocket. |
| 193–205 | Shimane | Airplane battle; Kito elders; plane tethered. |
| 209–211 | Shimane Ritual | Abandoned restoration for Seiko; height restored; memory/powers lost. |
| 213–218 | Memory Loss | Normal school life; vague awareness of Okarun. |
| 219 | Memory Loss | Powers and memories restored. |
| 221–225 | Memory Loss | Confession addressed; first date agreed. |
| 230–Present | Dragon Knights | Museum ambush; full power return. |
Volume cover appearances: Volumes 1, 2, 3, 7, 8, 9, 14, 15, and 16 — the most of any character in the series.
Seiko Ayase — Grandmother and Mentor
They bicker constantly. Momo called her a "phony spirit medium" as a child and spent years resenting the social embarrassment her rituals caused. She then spent a chapter in an underground ruin realizing the rituals were legitimate protection techniques and the resentment was misplaced. In Chapter 210 she abandoned her own physical restoration mid-ritual to take a lethal blow meant for Seiko. The relationship is the most important one in her life. The bickering has not stopped.
Ken "Okarun" Takakura — Partner and Romantic Interest
She saved him from bullies. She called him a turd. Two hundred and thirty chapters later she went on their first date. In between she formed the most reliable combat partnership in the series, declared him her "most wonderful friend" in Chapter 9, deflected his confession in Chapter 161, lost all memory of him in the Shimane arc, and acknowledged the feelings for real in Chapter 219. She still calls him a turd. This is how she shows affection.
Jin Enjoji (Jiji) — Childhood Friend
Her first love from elementary school, now a possessed teammate who lives under Seiko's supervision in the Ayase household. The romantic component is long gone; the genuine warmth is not. He was the only person she felt at ease around during her memory loss arc, which says something about how deep the original connection runs.
Vamola — Younger Sister Figure
Momo treated her with hostility until she saw Vamola's memories and understood she was a survivor of a destroyed planet. Then she became intensely protective — teaching her to eat with chopsticks, speak Japanese, and navigate human life. During the invasion arc she broke tactical formation specifically to try to heal a wounded Vamola mid-battle. Vamola now lives in the Ayase household and follows Momo everywhere.
Aira Shiratori — Rival Turned Ally
They trade insults like "cow" and "skank" and have done so since they met. Momo carried Aira to safety during the Silky fight. Aira carried Momo in her pocket for an entire arc. The insults have not stopped. The trust has never wavered once.
Unji Zuma — Ally
They met inside a cursed board game and survived it together. He joined the club after. She commands; he backs it up. The dynamic requires very little discussion.
Count Saint-Germain — Primary Antagonist
She clocked him as suspicious the moment he showed up as the club advisor. She has been right about him the entire time. Their relationship is purely adversarial — he wants the group's abilities; she wants to stop him getting them.
- Momo appears on the most volume covers in the series: Volumes 1, 2, 3, 7, 8, 9, 14, 15, and 16.
- Her grandmother's professional name is Santa Dodoria.
- She is "really bad at remembering names" — she started calling Okarun "Ken Takakura" because she could not recall his actual name and he happened to match her type.
- Seiko once "just about killed" a boyfriend Momo brought home. Boys and the house have been a cautious combination ever since.
- The Moe Moe Tri-Beam requires forming an actual heart shape with both hands to trigger. She has done this in open battlefields in front of her full team.
- She introduced herself as "the exquisite chosen savior of the world" in Chapter 24 — mid-combat — without apparent irony.
- During her miniature period, Seiko provided her with custom-scaled stationery and required her to continue attending class and completing coursework at fifteen centimeters tall.
- She owns a specialized vest from Seiko described in a volume bonus page as "bulletproof against evil spirits."
- She performs an impression called the "Rocket Engine Valve" which she was required to demonstrate for houseguests. No further details are provided.
- She plays competitive Othello with customers at her maid cafe job. Win rate unconfirmed.
- In color spreads, her dark brown hair picks up purple, pink, or reddish lighting effects — creating a noticeably different look from her standard black-and-white panel appearance.
🇯🇵 Japanese Voice Actors
Wakayama, Shion
🇯🇵 Japanese
Trott, Abby
🇯🇵 Japanese
Momo Ayase vs. Serpoians — Ch. 1–2
Restrained in a stasis field, Momo felt alien psychokinesis stimulate her brain and turned the power against them. She broke free, pinned the Serpoians down, and got out with an unconscious Okarun. First use of abilities. First confirmation that aliens exist.
Momo and Okarun vs. Turbo Granny — Ch. 5–10
City-wide high-speed chase functioning as a game of tag. Momo managed the spiritual tethers; Okarun provided momentum. The spirit was dragged across the territorial boundary and sealed. First confirmation that their partnership works.
Momo vs. Acrobatic Silky — Ch. 14–17
Frontline defense at a construction site against a hair-based long-range combatant. Held Silky in place for the finishing blow, then offered her own life force to let the dying spirit pass peacefully.
Momo (lead) vs. composite alien entity — Ch. 22–30
Trapped in a void dimension. Momo bound the fused creature's limbs with psychic hands and coordinated the team's movement to create an opening. After this fight the Serpoians formally designated her "exceptionally dangerous."
Momo vs. Kito family puppets — Ch. 37–43
Underground alternate reality combat. Momo held the defensive line and got everyone to the exit before the structure came down.
Momo vs. Kaiju / Sumerian Invasion Fleet — Ch. 68–120
Piloted a robot built from her own house to neutralize the kaiju. Led the Tokyo Tower defensive formation during the full invasion. Deployed Moe Moe Tri-Beam against bio-suit waves. Broke tactical formation to attempt to heal a critically wounded Vamola. The fleet was beaten regardless.
Momo (15cm)vs. Cursed Trunk Guardian — Ch. 135–151
At fifteen centimeters tall. Survived lethal game levels and commanded a troop rotation to clear the final castle. Severely injured. Maintained full spiritual output throughout the whole arc despite the size.
Momo vs. Kito elders and spiritual shark puppets — Ch. 193–205
Mid-air combat inside and outside a hijacked plane. Used psychic hands to tether the aircraft and prevent it from crashing while fighting the elders simultaneously during a spiritual typhoon.
Momo vs. Black Paladins — Shimane Ritual, Ch. 209–211
Fought to complete a restoration ritual under attack. Abandoned it mid-way when a lethal blow was aimed at Seiko and took the hit herself. Returned to full height. Lost all memory of Okarun and all psychic abilities. Both restored in Chapter 219.
Momo vs. Dragon Knight troops — Ch. 230–Present
Ambushed during a museum date by elite soldiers using spatial blades and ice technology. Fought at full power for the first time since Shimane. Protected Okarun after the Dragon Knight leader incapacitated him. Ongoing.