Characters / The Song of Saya

The characters of The Song of Saya. Unmarked Spoilers from this point onward, as every character is a Walking Spoiler to some extent.

Main Duo

Both

The main characters of the story, and the main couple.

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• Alas, Poor Villain: In the third ending. Horrible their actions may have been, after Fuminori realizes in the third ending that Saya is dead, he suddenly appears to have regained his humanity...just before he then chooses to smash his face in with an ax. Then, after Saya's mortally wounded and Fuminori commits suicide, she's reduced to pathetically dragging her dying body over to him as Koji repeatedly beats her to death while calling her a monster, only finally expiring when she touches Fuminori's face one last time. It ends up being quite possibly the most depressing scene in the entire game.
• Destructive Romance: Their relationship is mutually loving and happy between the both of them, but it's also very toxic. First off, it's between a Misanthrope Supreme and an Eldritch Abomination who looks like an underage girl, and both have a very unconventional sense of morality which leads them to commit worse and worse actions in the name of their love- a love that potentially dooms humanity. The more they fall in love, the worse they become, and the best ending is the one where they split up halfway through.
• Living Emotional Crutch: The driving force of the plot is their increasingly-unhealthy co-dependent relationship. She depends on him in order to navigate the human world and have someone she can interact with, and is willing to do anything for his sake. If he had never met her, he would have killed himself a long time ago. In fact, one of the three endings has him commit suicide immediately after seeing her dying body.
• Love Makes You Evil: The further they fall for each other, the more depraved they become.
• Star-Crossed Lovers: Since Fuminori is a normal human and Saya an Eldritch Abomination that eats people, they naturally have to hide their relationship (and Saya's existence) from the world, with Fuminori explicitly saying he disregards society's standards that forbid their romance. The only ending where they both survive is the one where he's locked up in a mental institution for the rest of his life, and she's out there somewhere still searching for her foster father, Ogai. The third ending makes this incredibly poignant.
• Together in Death: The only ending where Fuminori and Saya end up together is the one where they are killed, and she crawls up to him, caressing his face before she finally dies.
• Unholy Matrimony: In the second half, Fuminori decides to join Saya in her mission to convert humanity into her species and kill anyone in the way because of his love for her. Together, they eat people, turn Yoh into a Sex Slave, and try to kill Koji and Ryoko.
• Villain Protagonist: If Fuminori refuses to correct his agnosia, he becomes an Ax-Crazy killer wholly supportive of Saya's plot to transform humans into her species. Downplayed however as the latter half of the game is set far less from his perspective. Saya herself, the Deuteragonist and Love Interest, turns out to be a Humanoid Abomination alien Big Bad out to assimilate humans into her species.
• Yandere Couple: Fuminori is willing to let the world be damned for the sake of their love, while Saya turns Yoh into one of herself in part to punish her for being her competition, and Fuminori is elated by it.

Fuminori Sakisaka

Fuminori Sakisaka

Voiced by: Hikaru Midorikawa (credited as Hikaru)

The main character. A medical student in his twenties and the sole survivor of a horrible car accident. Saved by an experimental medical treatment, he now sees the world in a contorted manner with the exception of one thing: a girl named Saya.

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• Adaptation Name Change: His name is changed to Josh in the American comic.
• Adaptational Nationality: From a Japanese college student to a White American doctor in the comic adaptation.
• Adaptational Job Change: Downplayed in the American comic, where Dr. Josh is already a full-fledged doctor compared to the original Japanese medical student.
• Ax-Crazy: If he chooses to remain with his agnosia, Fuminori fully undergoes his Sanity Slippage into a full-on villain. He even buys an ax, later on, to use for the specific purpose of hacking apart one of his former friends.
• Better with Non-Human Company: Played with. After losing his normal sense of perception, he can only relate well with the human-looking Saya, who's actually an alien, and not with other people since they look like monsters to him. To him though, he thinks he's getting along better with actual humans and avoiding monsters.
• Bizarre Alien Senses: This is what his "agnosia" amounts to after his life was saved from the experimental brain surgery. As a result, Fuminori is stuck with the senses of an unknown alien species; and perceives the world as if it is made up of Gorn and the rest of humanity as flesh monsters, with the sky black regardless of the time, the variety of paint splashed in his living room, bathroom, and bedroom as vomit-green, along with having trouble identifying visual shapes and scaling. Also, he perceives Saya as a little human girl despite her true nature as an Eldritch Abomination and human flesh being the tastiest thing in the world.
• Blue-and-Orange Morality: Crosses over into this if he decides to reject Saya's offer of correcting his agnosia. Having completely forsaken his humanity, he then goes on to become a straight-up Villain Protagonist whose actions now only make sense to himself and Saya.
• Cannot Spit It Out: He won't tell anyone about his agnosia, for fear of becoming a guinea pig in lab experiments. Naturally, his silence ends up doing more harm than good.
• Cassandra Truth: In the first ending, where Saya corrects his agnosia, Fuminori notifies the police of all the dead people in his house after waking up. Unfortunately, they don't believe his explanation of what really happened and arrest him for all the murders. However, fate isn't completely cruel to him, as law enforcement brings in a psychiatrist who does believe him. As a result, Fuminori winds up in a mental facility instead of prison and gets to peacefully live out the rest of his days.
• Combat Pragmatist: He won't hesitate to use sneak attacks or psychological warfare to gain an advantage.
• Conveniently an Orphan: The fact that both his parents were killed in the same car crash that he almost died in means no one really knows what's going on inside his house.
• Death Glare: From the perspective of others, Fuminori looks tense. It's for a good reason, however.
• Decoy Protagonist: After his Face–Heel Turn, the story actually starts focusing on Koji, his (former) best friend, though he still plays a major role.
• Did You Just Romance Cthulhu?: Unknowingly at first, as his lover, Saya is an Eldritch Abomination, but later he willingly joins her.
• Double Think: Fuminori's cognitively aware that his agnosia is making mundane people and scenery look horrifying, but that doesn't stop him from being disgusted by the world and dehumanizing his former friends.
• The Dragon: To Saya, being the main ally in her mission.
• Driven to Suicide: Attempted it three months before the beginning of the game due to his condition, but didn't succeed. He succeeds in one of the three endings (Humanity wins) in a particularly gory way, by smashing his face repeatedly into the blade of an ax.
• Facial Horror: In the ending where Humanity wins, Fuminori commits suicide by repeatedly slamming his face onto the blade of the ax several times after Saya gets killed. In Koji's nightmare, he appears with a Gory Discretion Shot by having his upper body darken in shadow with blood running down.
• Failure Is the Only Option: He and Saya don't end up together in any of the game's 3 endings.
• Fate Worse than Death: How he viewed his abnormal condition up until Saya came into his life.
• First-Name Basis: To all of his friends.
• Girl on Girl Is Hot: He got really, really aroused by watching Saya and Yoh exchanging saliva and sperm after cumming from a boob job, causing his penis to be fully erect in a few seconds.
• Handicapped Badass: Downplayed. He's suffering from a bizarre form of "agnosia" (though his senses are really the result of being restructured to match that of an unknown alien species) but it doesn't stop him from trying to kill his former best friend in a straight-up fight with a hunting axe. But since he's never been in an actual brawl before and is not in good physical condition from his previous malnutrition, let alone his current diet, Fuminori could only hold Koji off for long until he gets his leg injured and nearly killed if it weren't for Saya.
• Harmful Healing: The brain surgery that saved his life did way more harm than good for his psyche, unfortunately. This also applies to the fact that he becomes more happy and fulfilled after committing evil actions for Saya.
• Hidden Depths:
  • Before the accident that resulted in Fuminori's agnosia, it stated that he was a slightly introverted, but kind person. He was also implied to be close to the Suzumi family as well if Hiromi's use of "oniichan" is of any indication.
  • He and his friends would go skiing every year, suggesting that Fuminori knows how to ski.
  • Once he made his decision to keep his twisted perception of the world, Fuminori referred to the Resurrection storyline of Osamu Tezuka's Phoenix, suggesting his interest in manga.
• Horror Hunger: Due to his condition he seemingly loses his appetite for normal food which now tastes unappealing to him, no matter what dishes Saya tries to cook. However, after he returns home one day and finds Saya crouching down and eating something lying on the floor, he joins in and finds human flesh tasty.
• How We Got Here: After the event of Fuminori's cruel rejection of Yoh's confession, the game flashes back three months ago to how his entire perception of the world changed and his meeting with Saya for the first time.
• Humans Are Bastards: Ruminated upon when he sees what Saya has done to Yoh:
  Fuminori: The horrifying cruelty of what she has done to Yoh is so very human.
• I Just Want to Be Normal: In the first of the three endings, he decides he would rather be cured of his agnosia.
• I'm a Humanitarian: Due to his distorted senses, only human meat tastes good to him. Unfortunately, his first meal happened to be one of his former friends.
• I Will Wait for You: In the first of the three endings, he tells this to Saya after being arrested for her murders.
• Jerkass: Freudian Excuse and love for Saya aside, Fuminori goes out of his way to be cold, spiteful, and nasty to all his former friends, as well as anyone else who interacts with him. This is particularly pronounced if he rejects Saya's offer to cure his agnosia, in which case he becomes a full-on Villain Protagonist.
• Jerkass Has a Point: While dehumanizing his former friends and acquaintances despite also knowing that they're not truly monsters due to his "agnosia" isn't the healthiest way to deal with his current situation, Fuminori isn't wrong to feel frustrated with the madness and disgust that his new senses cause him and the fear that telling anyone about it, besides Saya, would either be dismissed, be seen as "crazy", or be locked away and treated as a guinea pig. Never mind losing any semblance of a "normal life" regarding the stigma of having a mental illness in East Asian cultures if he did get his "agnosia" fixed. That being said, his choice of isolating himself and acting unnecessarily rude and nasty to others while Feeling Oppressed by Their Existence isn't truly helping the situation and, if the player chooses to keep his "agnosia", could either lead to his suicide or all of humanity transformed.
• Kick the Dog: Telling Yoh that he always hated her after she tries confessing how much she cares about him. He really could have been a lot less cruel about turning her down.
• Lack of Empathy: Likely because everyone looks like a fleshy monster to him, he has no problem being a Jerkass to people. When the player refuses to have Fuminori's agnosia cured through Saya, he starts to reject his humanity to continue loving her, becoming a straight-up cannibal, and having no problems killing others to ensure a peaceful future with Saya. It's painfully clear that his situation has rendered him unable to see humans as beings worthy of empathy, and he was only faking anything of the kind out of a lingering attachment to his old life — once he decides to toss that aside, all of his remaining compunctions about treating them, however, he pleases disappear.
• Lean and Mean: He's very skinny, and is said to be noticeably more so due to his agnosia making everything taste bad (except for raw human), and is not a very pleasant guy.
• Loving a Shadow: Ultimately, his love for Saya does fall within this trope, since he can only perceive the latter as a normal girl whereas viewing everyone else around him being an Eldritch Abomination, though she does reciprocate his feelings and provides him with genuine (if not entirely healthy) emotional support.
• Mentally Unwell, Special Senses: Had a life-saving brain surgery after a car accident. Unfortunately, this causes him to see grotesque images in everything. The sole exception is Saya, who he sees as a normal girl when in reality her true form is that of an Eldritch Abomination.
• Non-Action Guy: From what's implied throughout the story, Fuminori has never been in a physical fight before and is clearly in no shape to do so given his inability to enjoy consuming regular food...until his diet that is. Anytime he does get his hands dirty, he usually has the advantage of catching his opponent off-guard. When he tries to kill Koji the second time, Koji is shown to be prepared and a much better fighter than him and nearly beats him in their final duel before Saya intervenes.
• Non-Action Protagonist: For most of the story from his POV, Fuminori doesn't do anything that would be considered "fighting". While he's capable of overpowering and killing people, he relies heavily on surprise, stealth, the unbalanced environment, and whatever sharp objects he can get his hands on.
• Parental Abandonment: Both his parents were killed in a horrific car crash that led him to his medical illness.
• Protagonist Journey to Villain: His sanity is already rather fragile since he has to deal with his awful condition, but he slowly becomes more of a Jerkass, and if he stays with Saya, becomes The Dragon to her.
• Psycho Knife Nut: When he sees Saya being raped by Yosuke, he grabs the nearest kitchen knife and quickly hacks the man apart in a murderous, psychotic rage.
• Rage Breaking Point: At the start of the game, he was already living with his agnosia for three whole months. This causes him to reach a point of frustration where he is very nearly tempted to bash his Best Friend in the head with a chair after getting some spit on his face by the latter (from Fuminori's perspective, the salvia stank like a sewer and it was more than specks) as he can no longer tolerate the disgusting world around him anymore.
• Sanity Slippage: His insanity (or more accurately, animosity towards humanity) slowly worsens as the game progresses.
• Smug Snake: He really delves into this in his final fight against Koji, believing he could use the same tactic by sneaking up on the latter and taking advantage of the "hesitation of killing another human being". Predictably, it doesn't work the second time and he would've been killed by Koji if it weren't for Saya's intervention.
• There Are No Therapists: Averted. There are therapists available, but Fuminori refuses to see any of them because he doesn't want to become an institutionalized lab rat.
• Through the Eyes of Madness: He sees the world as if it were made of blood, flesh, and intestines. As his senses had been inversed, every human being is as disgusting as a pile of organs and putrid flesh pouring pus. Not only do humans look this way to him, but every single shape (His house, the sky, the cars) looks like it's covered in guts and gore. Everything smells foul, sounds foul, and feels foul to him. The actual Eldritch Abomination looks like an angel to him. And then he finds some meat that smells nice...
• Took a Level in Jerkass: He is said to have been a much nicer person before the events of the game took place.
• Tragic Villain: It is mainly because of the horrible agnosia that he spirals toward Ax-Crazy.
• Transhuman Treachery: In the Saya Wins ending, Fuminori is implied to have undergone a physical transformation off-screen to become a similar species to Saya. Though, with his Bizarre Alien Senses, he would find the process comforting and would view the Earth as reverted "back to normal".
• True Beauty Is on the Inside: A non-romantic example that's Played for Horror on a Horror Hunger level after Fuminori learns of Saya's true nature, and how he can only find human flesh edible while viewing humans as disgusting creatures of flesh and pus.
• Walking Spoiler: A lot of his tropes pertain to him post-Face–Heel Turn.
• Was Once a Man: Fuminori is implied to have to have transformed into Eldritch Abomination like Saya off-screen in the Saya Wins ending.
• You Are Worth Hell: In two of three routes, Fuminori chooses to remain in the living hell he's been suffering under, for the sake of staying together with Saya. These are also the routes where he descends into full-blown villainy since he's abandoned all his lingering attachments to his old life.

Saya

Saya

Voiced by: Naoko Takano (credited as Midori Kawamura)

A strange girl who's been living with Fuminori ever since he got out of the hospital. She's the only thing that appears normal to him.

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• Achilles' Heel: Is notably vulnerable to humans unafraid of her, as demonstrated by Yosuke and later Dr. Tanbo.
• A-Cup Angst: Downplayed, as she's quite jealous of how "big and soft" Yoh's breasts are when raping her for the first time while also simultaneously enjoying herself by fondling them. Later on, when Fuminori and Saya are having a threesome with the transformed and now mind-broken Yoh, Saya does get slightly annoyed when Fuminori prefers Yoh's mature physique much more compare to Saya's petite child-like figure, but it's Played for Laughs. It gets horrifically played with since Saya's true form doesn't have visible breasts (especially since normal humans will be driven insane upon looking at her true form, excluding Fuminori and later Yosuke, and Dr. Ougai not being rather sane himself, to begin with), and Yoh's original human body going through Transformation Horror to match the appearance of Saya's species.
• Adorable Abomination: Subverted; she may look adorable, but that's only from Fuminori's perspective, and her true appearance is implied to be so hideous that it drives most people insane just from looking at her. Her behaviour, later on, is far from cute as well.
• Apocalypse Maiden: Her pregnancy marks the end of humankind.
• Artificial Intelligence: Ougai initially believes Saya to be some biological variant of this.
• Because You Were Nice to Me: In the second ending, Fuminori's kindness to her inspires her to complete her mission to convert all of Earth's inhabitants into her species.
• Betty and Veronica: Veronica to Yoh's Betty.
• Big Bad: She's the story's primary villain, with her goal being the end of humankind through turning them into Starfish Aliens, though she has nothing to do with Fuminori's condition; to him, she's nothing short of a savior.
• Big Bad Duumvirate: With Fuminori if he decides to help her carry out her mission to morph humanity into her species.
• Bizarre Alien Sexes: It might be incorrect to even consider her a female, especially in the H-scene of where she was raping Yoh for the first time by penetrating her vagina with an organ that looks awfully phallic. She only accepted being called one after reading books about human reproduction.

• Blob Monster: The few details of her true form given point in this direction.
• Blue-and-Orange Morality: Saya is not conventionally evil and does not take delight in killing humans, she helps mental patients if they wish so and she only exists to fulfill a mission. Sadly, all of this still means she'll go around killing (and eating) humans both as a conventional food source and for studies, her healing skills can drive people even more insane than before and her mission is to "bloom" and release spores to convert the entire population of the planet into more beings like her.
• Brown Note Being: Her true form is treated like this. All of the humans that have seen it have immediately lost their sanity if they aren't outright killed by her. Only people who are already insane/disturbed seem to be unaffected, not to mention people with Fuminori's brain disorder.
• Ceiling Cling: Capable of doing this to sneak up on her prey, and she kills Omi this way.
• Character Development: Her progression mirrors Fuminori's. While he rapidly transforms into a monster as he comes to shun his humanity, she begins acting more and more human as her interactions with them continue. In an interesting example, this makes her worse than before, as she begins acting out on cruel emotions by luring in and raping Yoh out of spite.
• Combat Tentacles: Her true form has many of these.
• The Corrupter: Downplayed initially, and outright subverted in the first ending. After correcting Fuminori's agnosia, Saya later admits that she was getting scared by how he was changing because of her, which was one of the reasons she even made him the offer in the first place. However, should Fuminori refuse her offer and vow to stay with her no matter what, she becomes a much worse influence on him, particularly with the abduction and rape of Yoh.
• Cute Monster Girl: Subverted/deconstructed. She only appears to be cute to Fuminori, whose condition makes him see her as a cute girl. Her real appearance is never fully revealed, but it's implied to be so hideous that any normal person who sees her will be driven insane. There's also the fact that while not conventionally evil, her behavior when not acting as a loving girlfriend to Fuminori isn't exactly cute either.
• Dark Action Girl: A bizarre, Eldritch Abomination variety, she spends the game killing and eating people.
• Death by Childbirth: In the second ending.
• Depraved Bisexual: If her treatment of Yoh is any indication.
• Deuteragonist: The main Love Interest of the story.
• Don't Look At Me: In the first ending, she visits Fuminori in the mental ward at night one day, but refuses to let him see her true form despite his desire to see her one more time. Instead, she passes him a cellphone from behind the door which they use to exchange messages with each other until she finally bids him farewell.
• Eats Babies: Maybe. Supposedly one disappeared from the hospital while Saya was staying there, but nothing is confirmed.
• Eldritch Abomination: She's an alien from another dimension whose true form is apparently so hideous that a normal person will go insane just from seeing her. The one thing that drives her actions (aside from her genuine love for Fuminori) is her mission to convert everyone on the planet into beings like her. Unlike most examples, she isn't a nigh-unstoppable Reality Warper (her ability to turn humans into beings like herself is done through releasing spores rather than anything fantastical) and she can be killed with enough physical force.
• Even Evil Has Standards: Although she loves Fuminori and wants to stay with him, she is also aware of how she's influencing him for the worse and admits to being frightened by it. If Fuminori chooses not to have his agnosia corrected and tells Saya that he wants to stay with her, Saya is initially hesitant to accept his answer because she worries that he'll end up regretting his decision.
• Evil Laugh: Right after assaulting Yoh, she lets a distorted one out before turning her into one of her own species.
• Evil Smells Bad: Normal people frequently describe an utterly putrid smell whenever they come across her.
• Failure Is the Only Option: She and Fuminori don't end up together in any of the game's 3 endings.
• The Fake Cutie: Looks and acts this way in front of Fuminori.
• Fan Disservice: The revelation that her true form is that of an Eldritch Abomination might make her sex life even more disturbing than it already was.
• Flower Motifs: She compares herself to a dandelion. Fitting, considering the ending where she scatters her "pollen" to infect humans worldwide.
• A Form You Are Comfortable With: Her true form is implied to be a cross between a Blob Monster and a Starfish Alien. However, the trope is played with since Saya's human form isn't one she takes on by choice; she hasn't actually changed forms at all, and Fuminori only sees her as human due to his condition.
• Good with Numbers: To degrees more powerful than any computer, at that.
• The Grotesque: Her true form is implied to be so.
• Grotesque Cute: Obviously only applies to her human form.
• Hell Is That Noise: In-universe, her true voice when it's heard by normal humans is treated this way, and sounds quite bizarre.
• Humanity Is Infectious: Ougai speculated that the reason Saya had not immediately initiated her invasion is that she developed the human concept of love after reading romance novels, and thus she wanted to be loved herself before she could bloom. It comes to pass in the second ending, where she even explicitly states she's blooming for Fuminori's sake.
• Hypocrite: Saya subtly Slut Shames Yoh for the size of her breasts...all while she's raping poor Yoh and happily fondling her boobs.
• I Do Not Drink Wine: Fuminori mentions he never saw her eat in front of him at the beginning of the game. He later finds out why.
• I Just Want to Be Loved:
  • Eros type. The main reason why she didn’t carry out her sperm-collecting mission immediately was that she wanted to do it with someone she loved.
  • Also part of the reason for what she did to Yosuke was from the hope that if others became like Fuminori they would love her as well. Sadly things didn't turn out as well as she hoped.
• I'm a Humanitarian: Technically, although she only counts as one because she looks like a human in front of Fuminori while eating her favorite kind of meal.
• It Amused Me: She used to haunt the hospital Ogai worked in prior to meeting Fuminori, and spent her nights wandering the halls and scaring the crap out of insane patients (who would never be believed by anyone) for her own amusement. In fact, this was the reason she met Fuminori in the first place since she was trying to terrify him with her appearance, but when he didn't react to her with fear, she became interested in him.
• I Want My Beloved to Be Happy: In the first ending when she returns Fuminori's sight to normal again, while knowing that he can never love her the same way as he did before.
• Kill It with Ice: In the third ending, Saya gets killed with the help of liquid nitrogen after Ryoko discovers the only vulnerability in her biological makeup: below freezing temperatures.
• Leitmotif: Song of Saya I & II, two soothing but distinctly otherworldly and eerie tracks that capture everything about her character perfectly.
• Lovable Sex Maniac: Fuminori notes she is always eager to go to bed with him every day.
• Love-Interest Traitor: Subverted. She is revealed as the Big Bad, but Fuminori is perfectly okay siding with her.
• Mad Scientist: She performs experiments on Yosuke and other humans, giving them the same condition as Fuminori or turning them into being similar to herself.
• Mad Scientist's Beautiful Daughter: She's not really Ogai's daughter, but she still calls him her papa. Ultimately a subversion, as she is really far from beautiful.
• Magical Girlfriend: A monstrous variation of the trope, although her love for Fuminori is still portrayed as genuine.
• Meaningful Name: Saya (鞘) is the Japanese term for a sheath.
• Ms. Fanservice: In the comic adaptation, wherein she's aged up and looks like an adult. In the original game, however, she looks very young and girlish. This tends to rub some people the wrong way.
• Mysterious Waif: Deconstruction- she is not trustworthy at all, and pursuing the mystery will only end badly.
• Nigh-Invulnerability: She's not immune to pain though. Bullets still clearly hurt her, but they won't outright kill her. Liquid nitrogen on the other hand...
• Non Human Lover Reveal: She's actually an alien from another dimension, which is made obvious to every other character who sees her except Fuminori. The only reason Fuminori sees her as a human is because of his severe agnosia.
• Non-Standard Character Design: Has a much more "anime" look to her than the realistic designs of the other characters, especially in her hairstyle. Given what's actually going on, this is very fitting.
• Nothing Is Scarier: Fittingly considering what happens to those who see her true form, the reader is never shown what Saya is onscreen. The vague descriptions given do seem to suggest her being some kind of Blob Monster with Combat Tentacles that can expand and contract infinitely. She also has teeth, judging off the descriptions given of the bones in Ogai's home.
• Only One Name: Her name was given by Ogai, who named her after his beloved mother's cat.
• Power Gives You Wings: Or rather, in her case it's parturition.
• Psychopathic Womanchild: Kills and eats people with the same gravitas a child might give to playing their favorite game.
• Psychotic Smirk: She gives a very, very disturbingly serene one when convincing Fuminori to accept Yoh as their "pet". As Fuminori puts it, he finds her expression to be cruel, but so very human.
• Rape as Drama: She's on both ends of this trope: she is raped by Yosuke Suzumi, and later she rapes Yoh Tsukuba.
• Rasputinian Death: In the third ending. Even after getting half her body frozen by liquid nitrogen and then blown off by a 12-gauge shotgun, she somehow manages to slowly crawl over to Fuminori's side, all while Koji is bashing her body over and over with a steel pipe until she finally reaches him, weakly touches his face and then finally dies.
• Sanity Slippage: Subtly suffers from this after she's raped, though this only shows up in the routes where Fuminori doesn't correct his condition.
• Super-Intelligence: Her entire race has this trait. She for starters is able to not only read medical journals and understand them, but also does so at an incredibly fast rate.
• Super-Speed Reading: Demonstrates this ability while poring over Fuminori's medical charts.
• Token Good Teammate: Ogai speculates that Saya may have developed into something like this, by the standards of her own species. While he expected her to bloom and infect humans as soon as she'd gathered all the necessary knowledge, she became a romantic who wanted the love of a human. As a result, in the only ending where she does fulfill her mission, it's out of love for Fuminori, a human, rather than pure self-interest. Notably, he's not happy about it, feeling that he "spoiled" Saya by allowing her to become so human-like.
• To Serve Man: She can eat animals such as birds or cats, but prefers humans above all else.
• Violently Protective Girlfriend: In one of the endings, she kills Koji brutally and starts consuming his body immediately after breaking his neck because he was hurting Fuminori.
• Walking Spoiler: It’s essentially impossible to discuss her without revealing her role as the Big Bad and/or true nature.

Others

Koji Tonoh

Koji Tonoh

Voiced by: Yasunori Matsumoto (credited as Daijiro Kataoka)

Fuminori's friend. After Fuminori's accident, he has been trying to help Fuminori's life get back to normal.

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• Action Survivor: In the ending where he survives.
• Broke Your Arm Punching Out Cthulhu: He may stop Saya and save the world, but it comes at the cost of his sanity.
• Combat Pragmatist: His skill and experience in street fighting make him a superior combatant to Fuminori, who has never fought anyone before.
• Deuteragonist: Somewhere between a quarter to a third of the game is set from his perspective as he slowly uncovers what is going on with Fuminori and eventually tries to stop him and Saya. Tellingly, the decision that determines how the Final Battle plays out is from his perspective.
• Driven to Suicide: In the third ending. He hasn't killed himself yet, but the only way he can continue living with the knowledge he now has is by keeping a revolver loaded with a single bullet in his room all the time.
• First-Name Basis: To Fuminori and Omi.
• Good Counterpart: To Fuminori. Both are college students who ally with an unconventionally-haired girl, and both are fighting for love, but whereas Fuminori is fighting for a living Eldritch Abomination who wants to turn humanity into members of her species, Koji fights for his dead girlfriend Omi, to avenge her death by Saya’s hand.
• Go Mad from the Revelation: Even after Saya is defeated and killed, he can never go back to his normal life after learning all he did, having lost all his friends (and nearly his sanity) to Saya.
• He Knows Too Much: Fuminori tries to kill him because of this. Luckily for Koji, Ryoko finds him before he dies inside the well he was pushed into.
• The Hero: Essentially becomes this in the latter half of the game.
• Horrible Judge of Character: Justified in that Fuminori was his best friend, and Koji would have never guessed he would later try to kill him. Nonetheless, he still suffers a bit from this when Fuminori shows up, starts acting strange, and abruptly asks to be driven all the way to a far, remote location without suspecting he might be up to something.
• The Insomniac: Suffers from recurrent nightmares after surviving in the third ending.
• It's Personal with the Dragon: He outright tells Ryoko that he doesn’t care about Saya, he just wants to make Fuminori pay for what he did.

• The Match Maker: He and Omi were trying to get their respective friends, Fuminori and Yoh, together as a couple before the accident happened.
• Nice Guy: He's the only genuine example of this, unlike Fuminori (who Took a Level in Jerkass after his accident, and crosses over into Blue-and-Orange Morality in two of the game's three endings). At least before he gets broken down by his subsequent experiences.
• Only Sane Man: Lampshades this at one point, when he wonders why he keeps meeting crazy people all the time. This is before he loses it too, though.
• Pipe Pain: He picks up a steel pipe during his final confrontation with Fuminori at his new home.
• Pyrrhic Victory: In the third ending, he successfully stops Saya's plan and saves humanity, only in the process he has lost all his friends, one of whom he subjected to a Mercy Kill and another he saw transform into a monstrous killer and commit suicide. Come the epilogue, his sanity is rapidly falling apart, and it noted there's a good chance he'll eventually kill himself.

• Sanity Slippage: Begins as the Only Sane Man. By the third end, he’s outright hallucinating.
• Savvy Guy, Energetic Girl: With Omi, before she got killed. This only applies to their personalities though, and not their physical attributes.

• Spanner in the Works: If he hadn't called Ryoko when Fuminori wasn't looking, he would've been left to die in the well and Fuminori would've gotten away with everything with nobody to stop him.
• Sympathy for the Devil: Despite all the horrors Fuminori has done he still can't help but feel bad for his former friend, especially since it's clear he's not right in the head.
• A Tragedy of Impulsiveness: The player can actually invoke this trope by choosing to have Koji immediately phone Fuminori after finding the refrigerated remains of his girlfriend in Fuminori's house, rather than choosing the more rational option of contacting Ryoko first. Depending on which choice is picked, Koji will either play this trope entirely straight or avert it.
• Walking Spoiler: He essentially becomes the Hero Antagonist/new protagonist about halfway through.

Omi Takahata

Omi Takahata

Voiced by: Hyo-sei (credited as Elena Kaibara)

Koji's girlfriend and Yoh's best friend. She's killed by Saya when she invades in Fuminori's house. Her flesh is the first that Fuminori eats.

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• Body in a Breadbox: In the second and third endings, her boyfriend discovers her grisly remains (including what looks like her dismembered hand) in one of the storage containers in Fuminori's refrigerator. In the first ending, it's the cops who discover her remains after Fuminori calls them.
• Death from Above: Suffers this at the hands of Saya.

• Genki Girl: She's notably outgoing and energetic.
• Go Mad from the Revelation: Seconds before Saya envelops her, she loses her sanity.

• Killed Off for Real: The only one of the friends who are dead in every ending.

• The Match Maker: She and Koji were trying to get their respective friends, Yoh and Fuminori, together as a couple, before Fuminori's accident happened.

• Sacrificial Lamb: While Fuminori, Koji and Ryoko are alive in two endings and Saya and Yoh in one ending, Omi dies before one of the ending choices happens, meaning her fate can't be changed.

• Too Dumb to Live: Hearing a strange voice in Fuminori's home, she decides to investigate it rather than calling someone else or leaving. She dies as a result.
• Walking Spoiler: Being that she is the Sacrificial Lamb.

Yoh Tsukuba

Yoh Tsukuba

Voiced by: Mio Yasuda (credited as Izumi Yazawa)

A young woman with an unrequited crush on Fuminori. She sincerely tries to help and understand him but her attempts to reach out to him are always met with disdain.

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• Betty and Veronica: She's the Betty to Saya's Veronica.
• Butt-Monkey: Played for drama. Horrible things happen to her.
• Buxom Beauty Standard: Fuminori is more aroused by her voluptuous physique than by Saya's more childlike body, leading to the latter having a minor comedic A-Cup Angst moment, but nonetheless agrees with him wholeheartedly when they both rape her together.
• Break the Cutie: First by Fuminori brutally rejecting her, then by Omi's disappearance, before things take a turn for horrible in the routes for the second and third endings, culminating in Kill the Cutie in both.

• Cruel and Unusual Death: Koji is turned mad at the sight of her monster form and so beats her to death with a steel pipe.

• Empty Shell: After being turned into the same being as Saya, her mind is shattered and is faced with constant severe pain, leaving her with almost no trace of her personality nor intelligence. She regains more coherence when begging Koji to kill her.
• Fate Worse than Death: Fortunately, she dies in both endings this happens to her.

• I Cannot Self-Terminate: She begs Koji to kill her at the end of the game because she is suffering so much in her new form.
• The Ingenue: Her innocent appearance and naïve demeanor is played up in scenes she's in, particularly when Omi goes missing and when Fuminori can see her normally again.

• Love Hurts: All she wanted was for Fuminori to love her back, but he falls for Saya instead and gets turned into their Sex Slave.
• Meaningful Name: The kanji for "Yoh" means "beautiful". Yoh is consistently described as beautiful or pretty, and both Saya and Fuminori view her as such.

• Rape as Drama: First by Saya, then by Fuminori, then both at the same time...

• Slut-Shaming: When getting raped by Saya for the first time, the latter comments on how she must've seduced men for having "big and soft" breasts, all while enjoying herself by playing with them.
• There Is No Kill Like Overkill: First she gets shot four times, and then she gets beaten to a bloody pulp by Koji's steel pipe when he freaks out after seeing her transformed state. The text states that she stopped moving after the twentieth time he used the pipe, but he keeps going all the way past thirty.
• Too Dumb to Live: She knows that the one who is sending her messages on her mobile phone is not Omi, but she still goes into Fuminori's house. Even when she hears the strange noises and is horrified, she wants to believe it's just her friend trying to prank her. Saya doesn't kill her, but Yoh's transformation into an Eldritch Abomination ultimately leads her to her death by Koji.
• Tragic Monster: Outright begs Koji to kill her by the end.
• Transformation Horror: Happens while she is slowly and painfully getting transformed into the same being as Saya. When Koji phones her, she says that her ear is melting off, and her fingers aren't supposed to look like that...
• Unrequited Tragic Maiden: Things really don't end well for her in two of the endings simply because she had an unrequited crush on Fuminori.
• Walking Spoiler: Her role mostly concerns her victimization, transformation, and tragic death.

Ryoko Tanbo

Ryoko Tanbo

Voiced by: Mitsuki Saiga (credited as Makoto Sato)

Fuminori's doctor. A friendly professional who wants to help Fuminori as best as she can. Her real personality is actually very distant and calculated. She also knows a lot more about Fuminori's condition and treatment than she lets on.

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• Action Girl: Looks like your friendly, everyday Hospital Hottie...until about two-thirds of the way into the game.
• Anti-Hero: She's a cold, paranoid Jerkass, but she is still fighting for humanity.
• Beneath the Mask: On the job, she's a kind, friendly doctor, albeit somewhat cold and extremely secretive. Off the job, she's paranoid and obsessed with killing the Eldritch Abomination that haunts her dreams.
• Big Damn Heroes: She saves Koji from a situation where he almost certainly would have died a slow, painful death.
• Despair Event Horizon: In the "bloom" ending, she begrudgingly awaits her transformation into a Saya-like monster.
• Dying Moment of Awesome: Despite getting an axe cutting down through her left shoulder to her chest, she manages to point her 12-gauge shotgun at Saya, who has been partially frozen by liquid nitrogen, and pull the trigger in her final moments, all while smiling horribly.
• Dying Smirk: She smiles as she made sure to finish Saya off.
• Genre Savvy: The reason she is able to fare well against Saya.
• Good Counterpart: To Saya. Both are gals with odd hair colors who fight alongside a male partner for the future of humanity, but whereas Saya wants to assimilate humanity into her species, Ryoko wants to protect humanity.
• Go Mad from the Revelation: Discovering Ogai's research really pushed her over the edge.
• Hero Antagonist: While cold and calculating, she works to save humanity from Saya.
• Hospital Hottie: Her youthful looks are often remarked upon in the narration.
• Ice Queen: Always has a ruthlessly cold demeanor, even when she's behaving at her politest to her patients.
• The Insomniac: Suffers nightmares daily after finding of Ogai's research experiments.
• Normally, I Would Be Dead Now: Her dying moment of awesome is all about this - even after having her arm nearly hacked off an axe, she still manages to pull out a gun and finishes off Saya.
• Occult Detective: She mainly investigates Ogai's research, particularly Saya.
• Properly Paranoid: There really is an Eldritch Abomination out to assimilate humanity into her species.
• Psychotic Smirk: Non-evil example, but flashes these several times to show her breaking sanity, most triumphantly when she pulls the trigger of her shotgun in her final moments to finish off Saya while sneering at Fuminori.

• Sawed-Off Shotgun: Carries one around with her all the time. She deliberately modified hers to widen its range and for maximum damage.
• Walking Spoiler: Her initial sweet persona turns out to be a front for an Anti Heroic hunter.

Masahiko Ogai

Masahiko Ogai

^{Click here to see his corpse}  

Doctor Masahiko Ogai is the foster father of Saya and he worked in Dr. Tanbo's hospital until he suddenly disappeared. He's involved in several mysteries as Fuminori helps Saya to find him and investigates him. Ogai studied Saya and taught her various things, such as communication and maths. He committed suicide, and his skeleton is found by Doctor Tanbo and Koji if the player doesn't play the first ending.

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• Dead All Along: When Dr. Tanbo and Kouji find his body, he's been dead long enough to become mummified, suggesting he was dead even before Fuminori was admitted to the hospital.
• Driven to Suicide: He killed himself with a gun when the police investigated his case.
• The Ghost: He never makes an appearance during the story and the characters only talk about him, until his corpse is found.
• Mad Scientist: He even wished that Saya would find her love and could reproduce her race, even if it would exterminate the human race. He is the only one who didn't go mad at the sight of Saya and liked the mutated rats she created. He also has a collection of artifacts that are heavily implied to cause madness if you look at them with the naked eye.
• Posthumous Character: Is dead by the time Ryoko and Koji find him.
• Predecessor Villain: He kept Saya in his home where she developed her personality.
• Promotion to Parent: For Saya, as she never had much of a family.
• Red Herring: Given his mysteriousness, Ryoko’s apparent distaste for him, and that the entire first half of the plot is about Fuminori’s search for him, one might guess that he will turn out to be the Big Bad. He's not- he died before the story even began.
• Walking Spoiler: Aside from being Dead All Along, his notes lead to some reveals/exposition about Saya.

Yosuke Suzumi

Yosuke Suzumi

Voiced by: (credited as) Masayuki Onizawa

Fuminori's neighbor and an artist who lives with his wife and little daughter Hiromi next to the Sakisaka house. Saya messes with his brain, giving him the same vision problem as Fuminori. Believing that his wife and daughter are aliens, he kills them and then he rapes Saya, believing she's the only girl in the world. He's killed by Fuminori during his rape.

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• All Men Are Perverts: Believing that Saya is the only girl in the world, he rapes her.
• Asshole Victim: Sort of- it’s hard to feel sympathy for him when he's raping Saya, but he was a normal family man before she altered his mind.
• Ax-Crazy: After seeing an Eldritch Abomination that is actually his wife, he kills everything that looks alien.
• Body in a Breadbox: Like Omi, he and his family are dismembered and put in a refrigerator.
• Dirty Old Man: He rapes Saya because she is the only girl he can see in the world.
• Dramatic Irony: He doesn't recognize his wife and daughter after the surgery and kills them.
• Eye Scream: Fuminori stabs his eye first before getting hacked apart in bloody chunks.
• Fan Disservice: Raping Saya isn't nice to watch, but later when Fuminori's see this act, he believes that Yosuke is a purple Eldritch Abomination with its penis in her. ^note Ironically, it would appear the other way around to a normal observer.
• Go Mad from the Revelation: After Saya changes his brain.
• House Husband: He stays at home to work on his art while his wife works an unnamed occupation.
• Karmic Death: He gets killed the same way as his wife and daughter, being repeatedly stabbed and hacked apart by another person with the mess-up agnosia.
• Laughing Mad: After gaining a high from killing his wife and daughter due to his agnosia, Yosuke starts laughing with madness as he left his house and perceive the "new" world around him.
• Mad Artist: He was an artist prior to Saya changing the way his brain perceives things.
• Neat Freak: The game goes into great detail about his daily routine and how obsessive he is over keeping his house clean.
• Nice Guy: Played with. He offers his help cleaning Fuminori's garden since it's not properly groomed, but Fuminori guesses that he pretends to be nice and Fuminori's garden disturbs Yosuke's perfect image of his house. However, Yosuke talks with his wife about Fuminori's current situation, and they seem to be concerned about him. Then Yosuke goes insane and he loses his nice attitude anyway.
• Pater Familicide: The results of Saya's brain surgery and going insane.
• Ugly Guy, Hot Wife: Downplayed as his looks are natural for being a middle-aged father, while his wife is notably better looking compare to him.
• Walking Spoiler: His loss of sanity and subsequent rampage directly lead to a major reveal about Saya.
• Would Hurt a Child: Justified as he perceives the world in the same way Fuminori does, and he unknowingly kills his daughter due to him believing her as an Eldritch Abomination.
• Would Hit a Girl: Justified. He kills his wife and daughter due to believing that it isn't them since he perceives the world in the same way Fuminori does.

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