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Grisaia: Phantom Trigger Vol. 4

グリザイア:ファントムトリガー Vol. 4

TitleGrisaia: Phantom Trigger Vol. 4
Original titleグリザイア:ファントムトリガー Vol. 4
Play timeShort (6h39m from 2 votes)
PublishersFrontwing & Prototype
Frontwing & Prototype & Moshi Youxi Zhongwenhua Xingqu Xiaozu
Grisaia: Phantom Trigger Vol. 3
Grisaia: Phantom Trigger Vol. 5
Shops» JP¥ 2178 @ DLsite
» JP¥ 8712 @ DLsite (bundle)
» US$ 55.99 @ PlayAsia (bundle)
» US$ 57.99 @ PlayAsia (bundle)
Related anime[DB-ANN] Grisaia: Phantom Trigger - The Animation (Movie, 2019)


Kumashiro Megumi (Gumi), recently transferred from St. Aile's International School, has been training hard together with Rena and Maki - now fully recovered from their injuries. With the help of her mentor, Tohka, she’s shaping up to be a fine sniper.

Just as one new student settles in, another has her sights set on joining the girls in Class A, Mihama’s elite combat unit. Her name? Sengoku Taiga. Haruto, the team’s handler, has one condition for Taiga’s transfer: that Chris serves as her supervising officer.
The two seem an unlikely pair at first, but after spending some time with little Taiga, Chris soon finds a way to see things from her perspective.

It’s at that moment that the nation is suddenly rocked by a terror attack on an unprecedented scale. Chris rushes to the scene, aware of what’s at stake, but paying no heed to the dangers ahead.

Just as she did, once before.

“This is even worse than we could’ve imagined...”
“Two of the guys are dead! What happened? What the hell happened!?”
“Y’know what it means to bring nukes into the country...?”
“It’s scary, shooting someone for the first time... My legs are shaking.”
“That fool... Is she trying to ruin everything!?”

The death toll keeps on rising, but SORD are stuck watching helplessly from the sidelines. What destiny awaits Chris, Taiga... and Mihama Academy?

“Oh, right... I must have died...”

Clutching to memories of her long-dead mother, she too prepares for an eternity of slumber...

Hide spoilersShow minor spoilersSpoil me!


Aoi Haruto蒼井 春人
Aliasesハルト, Junior
HairAntenna, Blue, Long, Parted to Side, Sidehair, Straight, Waist Length+
BodyAndrogynous, Pale, Slim, Teen
ClothesBlindfold, Collar, Hakama, Headphones, Necktie, School Uniform, Vest
ItemsBokken, Katana
PersonalityFriendly, Hardworker, Kind, Mischievous, Ore, Proactive
RoleClassmate, High School Student, Mentor, Popular, Tsukkomi
Engages inDriving, Fighting, Investigation, Kendo, Planning, Teasing
Subject ofAmnesia, Teasing


A former CIRS agent who now serves as a tactical instructor at Mihama Academy, and as a handler to the school's students. Though he looks young, he has a great deal of experience on the field, and he still has lots of friends on CIRS' current roster.

Haruto radiates warmth and gentility, but this has left him an object of teasing at Mihama - the girls under his charge tend to treat him like he's just another kid. He can also be pretty tight-lipped about his past. Some of his memories are in fact rather vague, and there remain lots of gaps in his work history.

Gunplay really isn't Haruto's strong suit. He doesn't often succeed in striking his target (though some people believe this apparent ineptitude to be a deliberate ploy on his part).

He has little interest in food, and will usually make do with just a salad.

Haruto will often issue strategic commands on the battlefield, but he rarely finds himself standing in the trenches. He uses a sword, but not one made in the Japanese fashion; it would certainly be a bit of a stretch to call it a katana.

"Haha, my classmates often tell me I'm a total asshole."

[From official English website]

<hidden by spoiler settings>

Main characters

Fukami Rena深見 玲奈B
Aliasesレナ, Rena the Rabid Dog, Sicks
MeasurementsBust-Waist-Hips: 87-57-86cm, E cup
Birthday27 November
HairBraided Crown, Sidehair, Straight, Violet, Waist Length+
BodyBig Breasts, Slim
ClothesGloves, Hairpin, Headphones, Kevlar Armor, Knee-high Socks, School Uniform, Tank Top, Tracksuit
ItemsHandgun, Motorcycle
PersonalityCompetitive, Confident, Deredere, Energetic, Food Lover, Hardworker, Idiot, Loyal, Obsessive, Outgoing, Stubborn, Sweets Lover, Timid, Watashi
RoleAssassin, Bodyguard, Classmate, High School Student, Orphan
Engages inAthletics, Driving, Gardening, Investigation, Mass Murder, Shopping, Teasing, Unarmed Fighting
Subject ofPiggyback Ride, Teasing
Voiced byUchida Maaya


A gunwoman who's charged with shooting on Haruto's behalf, due to his personal distaste for firearms. Rena's a lively girl, amiable and warm in her dealings with just about everybody. She's tall and well-proportioned, her limbs smooth and powerful. She makes sure to stay healthy and active.

Rena has a strong sense of responsibility, and tends to be quite cautious; she's always scanning the environment for threats. Her loyalty to Haruto, her 'Master', and the docility she demonstrates around him, are most notable.

However skilled Rena is physically, she struggles quite a bit in the classroom. When told off, she quickly grows timid; she has a good appetite for learning nonetheless, and responds well to praise.

She favors an M1911-style pistol, and lets loose about two hundred rounds every day.

Rena also has a tendency towards obsession. Once she develops an interest in a handgun, she can't make do with any other weapon until the heft of that particular gun is ingrained in her senses. Though law enforcement agencies having summarily dismissed the superiority of .45 ammo, Rena obstinately persists in using it, even going so far as to get lightweight bullets specially manufactured by the school gunsmith.

She has a motorcycle license, and when she's feeling particularly ravenous, she'll often sneak out in the middle of the night for ramen.

"I haven't had a really filling meal recently - like sushi, or something nice and meaty..."

[From official English website]

Ikoma Murasaki狗駒 邑沙季AB
Aliasesムラサキ, Saki
MeasurementsBust-Waist-Hips: 79-55-84cm, B cup
Birthday11 January
HairAhoge, Pink, Sidehair, Straight, Twin Tails, Waist Length+
EyesJitome, Violet
BodyMedium Breasts, Pale, Slim, Teen
ClothesLeg Warmers, Sarashi, Scarf, School Uniform
ItemsDagger, Handgun, Kunai, Laptop, Pen
PersonalityFunny, Sleepyhead, Stoic, Talkative, Watashi
RoleAssassin, Childhood Friend, Full Sister, Gamer, High School Student, Ninja, Roommate, Younger Sister
Engages inComputering, Disguise, Drawing, Infiltration, Murder, Planning, Stalking
Voiced byTanezaki Atsumi


A self-proclaimed 'Russian ninja', Murasaki's actual heritage is shrouded in mystery.
She makes all sorts of claims about her 'ninja skillz', including her certification as a 'master ninja'.

Her real forte is disguise, and she takes on a lot of missions involving stealth and infiltration; her calling-card is the .22 subsonic ammo she always uses. Alongside easily concealable weapons like small-bore automatic pistols and her kunai, or Japanese dagger, Murasaki's fond of katana swords and rifles.

Her personality can be difficult to pin down; she rarely displays her true feelings in front of others, and obviously has fun saying weird things to confound other people. Even during the summer, she wears a long scarf around her neck to signal her ninja identity. At first glance, it looks like the kind of scarf a normal female student might wear, but it's actually woven from a mix of aramid fiber and synthetic protein, making it both bullet-proof and fire resistant.

Murasaki's been friends with Haruto since she was a young child, and loves him like an older brother. Or could her adoration for him be something more?

She ranks third in close-quarters combat, her ferocious speed losing out to Haruto's skill and Rena's raw strength.

"... Yeah. I just like ninjas, that's all. I an be anywhere and everywhere."

[From official English website]

Kujirase Christina Sakurako鯨瀬 クリスティナ 桜子O
MeasurementsBust-Waist-Hips: 84-57-85cm, D cup
Birthday4 September
HairBlond, Short
BodyMedium Breasts, Pale, Slim, Teen
ClothesGlasses, Headband, Pantyhose, School Uniform
PersonalityDocile, Kind, Pacifist, Proactive, Puffy, Refined, Smart, Strict, Watashi
RoleBritish, Dormitory Manager, High School Student, Honor Student, Roommate
Engages inCleaning, Computering, Cooking, Investigation, Planning
Subject ofTeasing
Voiced byNazuka Kaori


An explosives and computer specialist, born in Shanghai to British parents. Of the 148 students at Mihama Academy, Chris is ranked eighth in terms of test scores, and she's ended up in charge of helping the rest of the class with their studies. She comports herself well around other people, and ordinarily seems quite meek, but she's said to become genuinely scary when she's angry.

Just like Haruto, Chris isn't too fond of guns, and generally refuses to carry one. In fact, her standard-issue handgun is a defective model that ought to have been returned to the manufacturer, and that doesn't appear to bother her in the least.

She used to wear her beautiful blonde hair down past her shoulders. When she was in elementary school, though, she accidentally set off a bomb in the school toilets, and singed her hair; ever since then, she's kept it short.

A helpful girl who's proficient in every kind of household chore, Chris is something of a den mother to the other students: she prepares meals in the student dorm, cleans her friends' bedrooms, and does their laundry. She also has rather poor eyesight, wearing contact lenses almost all the time. Only in the brief moment between her waking up and washing her face will you find her in glasses.

"I see. In that case, don't hesitate to call for me if you do happen to step on a landmine."

[From official English website]

Shishigaya Touka獅子ヶ谷 桐花A
Aliasesトーカ, Tohka, Major Killjoy
MeasurementsBust-Waist-Hips: 74-56-79cm, A cup
Birthday10 August
HairGrey, Straight, Twin Tails, V Bangs, Waist Length+
BodyPale, Short (obsolete), Slim, Small Breasts, Teen
ClothesAnkle Boots, Cloak, Hoodie, Kemonomimi Hood, Patterned Thigh-high Stockings, Pendant Earrings, Pin-Back Button, School Uniform, Shimapan, Tracksuit
ItemsSniper Rifle
PersonalityClassic Tsundere, Immature, Serious, Sharp-tongued, Short-tempered, Shy, Smart, Watashi
RoleAmerican, Assassin, German, Half-orphan, High School Student, Roommate, Sniper, Tsukkomi
Engages inAthletics, Disguise, Fighting, Murder, Reading, Sarcasm, Shopping, Teasing
Subject ofTeasing
Voiced bySakura Ayane


A sniper. Her mother is German, her father American. Growing up, Tohka learned self-defense techniques and riflery from her father, a former soldier, and his comrades; she was the youngest ever winner of a shooting competition in her hometown. In the wake of her mother's death, she spent two years attached to a PMC (private military contractor) alongside her father.

She can be extraordinarily belligerent, and sometimes breaks into outbursts of violence. She is, in short, a classic tsundere. Though infinitely curious about the world, she has a pragmatic side, too: she won't tolerate any nonsense. She possesses a measure of shrewdness and inner strength that belies her cute, childish exterior.

Whenever she was left home alone as a child, Tohka would shove a shotgun in the face of any cold-caller who came knocking; she's since become known for her shyness around strangers. She tends to take an instant dislike to anyone she meets. She's clearly desperate to be regarded as a friend by others, though, however little effort she exerts in this regard herself.

She's basically pretty bad at making friends. She also has a bit of a complex about her small stature, and it's to compensate for this that she tries to act all grown-up.

"Really? Then listen up, all of you! Calling me 'cute' IS badmouthing me!!"

[From official English website]

Side characters

Arisaka Shiori有坂 秋桜里A
MeasurementsBust-Waist-Hips: 82-58-85cm, C cup
Birthday26 June
HairBrown, Short, Thick Eyebrows
BodyPale, Slim, Teen, Younger Appearance
ClothesHairpin, Military Uniform, Pantyhose, Skirt
PersonalityClumsy, Coward, Docile, Honest, Kind, Low Self-esteem, Observant, Sensitive, Stubborn, Watashi
RoleHomeroom Teacher
Subject ofTeasing
Voiced byIzawa Mikako


The unfortunate new homeroom teacher at this unusual school, who really has no idea what she's gotten herself into.

An extremely earnest young woman, she can end up letting people walk all over her in her efforts to accommodate them. She's perhaps best described as 'unassuming' - or, more to the point, 'cowardly'. She wouldn't look out of place as a nameless NPC in some generic role-playing game. She doesn't have much luck at work; she's the type to end up causing a huge calamity, and then get caught out straight away by her superior.

According to Arisaka herself, she was equally unlucky as a kid - she's always drawn the short straw. Sometimes it can genuinely seem like she's cursed.

Other than that, though, her life is pretty ordinary. Mundane, even. That can seem like a breath of fresh air somewhere like Mihama Academy. Like everyone else, she appears simply to have drifted into the school.

"It might be too late at this point, but do you really think I'll be alright?"

[From official English website]

Inohara Maki井ノ原 真紀A
AliasesSoul Speed, Bucks, Overkill, Makster
MeasurementsBust-Waist-Hips: 93-59-89cm, F cup
Birthday4 April
HairBlack, Ponytail, Sidehair, Spiky Bangs, Straight, Thick Eyebrows
BodyBig Breasts, Pale, Tall (obsolete), Young-adult
ClothesCatsuit, Gloves, Jeans, Kevlar Armor, Overall, Shirt, Tank Top, Watch
ItemsDual-Wield Weapon, Handgun, Motorcycle
PersonalityArrogant, Atashi, Cold-hearted, Competitive, Cruel, Ignorant, Loner, Loud, Mysterious, Stubborn
RoleAssassin, Biker, Criminal Accomplice, Infamous, Mafia, Villain
Engages inDriving, Fighting, Theft
Subject ofTeasing
Voiced byNanjou Yoshino


AKA “Soul Speed”.
Maki is affiliated with a hostile Russian crime syndicate; it is likely that she is being employed by the organization as both a contract killer and bagman.

Maki is strong and well-built, making her handy in a fight. She wields four Glock 26s, and goes by many aliases. Though wary of others and very quick to anger, Maki’s actually remarkably naïve.

[From official site]

Kumashiro Megumi九真城 恵O
AliasesGumi, Sergent Gummer
MeasurementsBust-Waist-Hips: 84-55-82cm, E cup
Birthday18 November
HairCyan, Eye Covering, Parted to Side, Short, V Bangs
BodyPale, Slim, Teen
ClothesBeret, Cross Design, Cuffs, Guimpe, School Uniform
ItemsSniper Rifle
PersonalityCompetitive, Food Lover, Hardworker, Serious, Stoic, Stubborn
RoleAssassin, Foreigner, High School Student, Kouhai
Engages inFighting
Voiced byMimori Suzuko


A sniper from the SORD unit based at St. Aile’s International, sister school to Mihama Academy.
It’s said that once she has you in her sights, there’s no escape - hence her nickname, “Mystic Eye”. Her main weapon is a Blaser R93.

Gumi behaves like an old-school war veteran, and tends to adopt a ludicrously single-minded approach to her duties. Burning with a powerful sense of justice, Gumi takes a hard line against unscrupulous behavior; the harshness of her rebukes can come as quite a shock.

Her special skill is speed eating, and she won’t be beaten in this by anyone.

"Sorry, senpai. There's still something I need to do - one task I have to complete."

[From official site]

Nogami Himeko野上
AliasesNogamin Skywalker, Min-chan
HairBlack, Short, V Bangs
EyesJitome, Teal
ClothesBracelet, Skirt Suit
PersonalityCautious, Kind, Lazy, Loyal, Sharp-tongued, Strange, Watashi
Engages inComputering, Planning
Subject ofTeasing
Voiced byOumi Tomoe


Nogami has worked as Sengoku Ichiru's assistant ever since her time in CIRS’ Special Medical Division, and she continues to uphold that role at Mihama Academy.

While brilliant, she also possesses several personal faults that get in the way of her day-to-day life. Case in point: the fact that her room is always such a total mess. Haruto thinks of her as a sort of surrogate older sister, turning to her first whenever he has issues that he's reluctant to discuss with Principal Sengoku.

"Nogami is fine."

[From official site]

Sengoku Ichiru仙石 一縷
HairAhoge, Blond, Wavy
BodyBig Breasts, Olive, Slim, Young-adult
ClothesHakama, Lab Coat, Lace Lingerie, Necklace, Thigh-high Stockings
PersonalityMischievous, Proactive, Relaxed, Watashi
RoleCousin, Famous, Full Sister, Principal, Spy
Engages inKendo, Smoking, Teasing
Voiced byYukinari Toa


Thanks to her background, she has a lot of pull with the upper echelons at CIRS. It's rumored that in the course of her work for the organization, she's come to learn the weaknesses of many of her fellow agents. This may have been a key factor in her "retirement" when the organization was restructured.

A report at this time detailing the gap between the American and Japanese intelligence services in terms of both efficacy and intelligence-gathering capabilities inspired Sengoku to create SORD (Social Ops, Research & Development); she then used her dismissal as an opportunity to establish herself, and SORD, as a leading force in tactical development.

"I know... Keep it brief, right? I'm in no mood to drone on when I don't have my coffee or cigarettes."

[From official site]

Sengoku Taiga仙石 大雅AB
MeasurementsBust-Waist-Hips: 67-53-72cm
Birthday29 July
HairBlack, Braid, Long, Parted to Side, Wavy
BodyKid, Olive, Short (obsolete), Slim, Small Breast Sizes
ClothesHair Flower, Sailor School Uniform, School Uniform
PersonalityArrogant, Blunt, Genius, Loner, Spoiled, Watashi
RoleCousin, Elementary School Student, Ojousama, Pet Owner, Transfer Student
Engages inPlanning
Voiced byTakamori Natsumi


First cousin to Sengoku Ichiru, and an elementary student in Mihama Academy’s sapper school. Taiga’s always lived a pampered life, having grown up as heiress to the Sengoku estate. She’s a quick-witted and intelligent girl, as evidenced by the fact that she’s already passed her university entrance exams.

With all the expectations heaped on her, it’s only natural that Taiga should come across as a little arrogant. This is one of the reasons why she tends to keep her distance from other people - though she’s quite happy on her own. Rena calls her “The Milquik Master”, following a serendipitous encounter back when she first arrived at Mihama.

Taiga is intent on participating in activities that are usually closed to children of her stature; she cares little for age restrictions, nor other people’s opinions of her. Eventually her persistence pays off, when Haruto finally heeds her request to join Class A.

"Kujirase... Where am I to be allowed out into the field?"

[From official site

Yamamoto Izumi山本 イヅミ
AliasesMocchan, Izu-chin
HairOrange, Shaggy, Short
BodyPale, Slim, Teen
ClothesCrop Top, Fingerless Gloves, Headphones, Jumpsuit, Necklace
PersonalityEnergetic, Hardworker, Kansai-ben, Loud, Short-tempered, Uchi
RoleApprentice, Blacksmith, Engineer, High School Student, Mechanic, Schoolmate
Subject ofTeasing
Voiced byKitagaito Haruka


A gunsmith in Mihama Academy's second-year mechanical engineering class. An expert in both metalwork and plastics, Yamamoto handles almost all of the firearms and ammunition used by Mihama students, whose guns are updated with new QR tags every time she carries out maintenance work.

Every now and then you can find her zoned out and thrashing away at her air guitar, while a thumping beat blasts through her headphones.

"If ya don' want the ammo I prepared for ya, ya don't hafta use it, ya know?!"

[From official site]

Makes an appearance