History Videogame / SaikoNoSutoka

* SupernaturalRepellent: In Yangire Mode, pages with bunny drawings that are randomly spread around the school can be used to ward off Saiko and Elissu temporarily. After all pages are shown to them, they [[MoodWhiplash comically run away screaming]] and drop the exit key, buying Akira enough time to escape the school. The Voorhees mask that is in one of the alcoves can also be used to ward her off for a much longer time.

* VillainousBreakdown: If Akira [[HorrifyingTheHorror shows all]] [[SupernaturalRepellent the bunny drawings]] to her, Yangire Saiko has a rather comical panic attack and drops the real exit key[[note]]the fake exit key is in the headmaster's office[[/note]].

* HalloweenEpisode: The Halloween Edition spin-off has nothing to do with the main game (beyond the implication that, like the upcoming Nightmare Mode update, it's Akira having another nightmare). It involves Akira trying to get out of the forest with a zombie Saiko's help, while trying to keep her from eating him ''and'' fending off '''ANOTHER''' psychotic girl who's out for his blood.

This build is meant to be a test for the upcoming Nightmare Mode of the main game. You can download it for free [[https://habupain.itch.io/saiko-no-sutoka-halloween-edition here.]] A full fledged SpinOff (''Saiko No Sutoka No Shiki'') is currently under development.
%%It can be downloaded on Steam [[https://store.steampowered.com/app/2264020/Saiko_no_sutoka_no_shiki/ here.]]

* DeconstructedCharacterArchetype: The {{Yandere}} trope. While many might find it fun or titillating even to have a cute girl relentlessly obsessed with them, the game flips it upside down: Saiko is an deranged murderer whose unhinged mannerisms only serve to make her look creepy more than anything. [[spoiler:It's also revealed that ever since their CrashIntoHello meeting, her obsession of Akira became unhealthy as she even transformed ''her entire bedroom'' into a StalkerShrine for him. On the flip side, Akira felt horrified by her erratic behavior as she even tailed him all the way to ''the boys' bathroom'', indicating that she has NoSenseOfPersonalSpace even when she's told off]].

* {{Jerkass}}: Shinji proved to be this [[spoiler:when he rudely told Saiko to stop stalking Akira, especially after he noticed that she even carved Akira's name on her wrist. It becomes the catalyst for her to have Shinji killed off so he won't be an obstacle to her plan to have Akira by herself]]. WordOfGod also is that [[spoiler:he stole Saiko's diary and spread the pages around the school just to bully her]].

* LoveMakesYouCrazy: Saiko insanely pursues Akira, who obviously views her as an AbhorrentAdmirer. [[spoiler:Saiko's DID and excessive clinginess is the reason why she and Akira broke up. Since then, Saiko stalked Akira for some time before escalating it to forced kidnapping and murder]].

* DeconstructedCharacterArchetype: The {{Yandere}} trope. While many might find it fun or titillating even to have a cute girl relentlessly obsessed with them, the game flips this premise upside down: Saiko is an deranged murderer and her unhinged and erratic mannerisms only serve to make her look creepy more than anything. [[spoiler:It's also revealed that ever since their CrashIntoHello meeting and subsequent dates, Saiko's obsession of Akira became unhealthy as she even transformed ''her entire bedroom'' into a StalkerShrine for him. On the flip side, Akira actually felt horrified by her behavior as she even tailed him all the way to ''the boys' bathroom'', indicating that she even has NoSenseOfPersonalSpace even when she's told off]].

** At times when he locks himself up in a room, she will beg him to let her in, saying she won't hurt him again. [[SchmuckBait Even if he does comply]], she will go back to her attempts at preventing his escape, eventually get angry and attempt to murder him again, or immediately attack him upon opening the door for her.

** The God of [=RNG=] achievement's image shows Akira [[spoiler:dressed up similar to [[https://cdn.cloudflare.steamstatic.com/steamcommunity/public/images/apps/1546860/42dfc53c160352ff64dc6fd2e2c2821f4e99c9a6.jpg Yangire Saiko]] (including red facepaint, a bowtie, and bunny ears). He also has the same RedEyesTakeWarning as Yangire Saiko and an unnerving GlasgowGrin that makes him look like ComicBook/TheJoker]].

** In Yandere mode, she pretends to help her senpai's friend, Shinji, by walking him around the school, then reverts back to her murderous persona if he foils her scheme.

** In one of the endings [[spoiler: Saiko tries to break through the glass doors of the school entrance and accidentally impales herself on a shard, leading to her death.]]

* IfICantHaveYou: Being a yandere, Saiko kidnaps Akira and holds him hostage so he won't escape. She even kills Shinji out of jealousy. Judging by Saiko's comments, it's implied she also dislikes Akira dating other girls.

* LastChanceHitPoint: As of 2.2, Saiko can invoke this on Akira if he hasn't annoyed her too much. Instead of going for the kill shot, she leaves him at one HP and leaves, with the warning she will kill him next time.

** While running seems like a sensible thing to do when trying to escape from a knife-wielding psycho, doing this only gives Saiko a better idea of where the player is, as she can hear their footsteps, letting her continually chase them down until they eventually make enough mistakes to die. However, with enough distance between the player and her, quickly sprinting around a corner and then walking after breaking line-of-sight causes her to immediately forget where the player is, giving them much more room to operate as she scutters off to other parts of the school.

* BoulderBludgeon: In 2.2.7, Akira can now lob a brick and momentarily stun Yangire Saiko so he can steal the exit key off her, but that will [[BerserkButton set her off]] as she will insta-kill Akira if Saiko catches him.

* CampingACrapper: If Saiko finds the player hiding in one of the bathroom stalls, she attempts to strangle them, though she backs out if the player fights back. Saiko then reverts to her "kinder" side, offers him a potion (that could be tainted), [[PleaseDontLeaveMe and asks them to not leave her]].

** The subtitles that appear are color coded to which mode Saiko is in. Crimson red is her default when she's in her murderous state, while her more 'helpful' disposition's subtitles are purplish. [[spoiler: Nightmare Mode has the subtitles appear in black and red.]]

* ContrastingSequelAntagonist: While the HalloweenEpisode spin-off isn't a sequel, it does feature a new antagonist. Unlike Saiko, who suffers from mental health issues like DID and is unhealthily obsessed with Akira, the psychotic woman out for his blood has zero romantic attachment for him and even calls him a "deviant" because of his association with a zombified Saiko. The psycho woman even despises Saiko, disparaging her [[spoiler:and even killing her [[KickTheDog in front of Akira]] after she helps him escape]].

* CreepyCircusMusic: For Yangire mode, a warbled version of the "Entry of the Gladiators" circus theme plays when Saiko is nearby and speeds up in tempo as she gets closer. The theme is reversed when Elissu is the pursuer.

* CuteIsEvil: Don't let her adorable appearance fool you. Saiko is a remorseless, vicious killer who will gladly murder you with a bloody knife.

* DeadlyGas: Saiko [[spoiler:tosses poison bombs to slow you down in Yandere Mode. She even wears a gas mask to shield herself from the fumes]].

* DeconstructedCharacterArchetype: The {{Yandere}} trope. While many might find it interesting to have a cute girl relentlessly obsessed with someone, the game flips it upside down: Saiko is an insane murderer and her unhinged mannerisms make her look creepy. [[spoiler:It's also revealed that ever since their CrashIntoHello meeting and brief date, Saiko's obsession of Akira became unhealthy as she even transformed ''her entire bedroom'' into a StalkerShrine. On the flip side, Akira actually felt repulsed at her behavior as she even tailed him to ''the boys' bathroom'', indicating that she even has NoSenseOfPersonalSpace even when she's told off]].

** Nightmare will be the hardest of all modes. [[spoiler:It will be [[EvilIsNotWellLit as dark as, if not darker than Yangire Mode]]. The subtitles are rendered black so you have a harder time knowing which mode Saiko is in, and ''she's invisible'', with the only way to see her being [[SeeTheInvisible the bloody footprints she leaves behind her]] and [[InvisibilityFlicker the brief moments she returns to visibility when she interacts with something]]. The game will also shift between "memories and realities" of previous modes to confuse the player and show that Akira has developed PTSD, experiencing flashbacks of the events that led to Saiko's death]].

** Her docile state is fond of this in gameplay. Turning your back on her results in her grabbing the player from behind and holding her knife to their neck before she eventually begins choking them. Resisting this causes her to fall to the ground, where [[{{Hypocrite}} she complains that you're hurting her.]] She then switches to her violent state and tries to stab you.

* GoodIsNotNice: In her Yandere state, where she's less murderous, Saiko is still '''far''' from good, but at least she is not actively trying to kill Akira. That being said, even when she isn't trying to kill him at that moment, she can still choke him out and drag him inside a classroom, potentially drug him with tainted medicine after her Yangire state wounds him, or flat-out insult him when taking keys from him.

* DoesNotLikeShoes: Saiko wanders barefoot throughout the school. Even in Yandere mode, where she's dressed in her normal school attire, except for loafers.

* TheyLookJustLikeEveryoneElse: Yandere Mode has Saiko with long straight red hair, glasses, and a clean uniform ([[DoesNotLikeShoes although still barefoot]]), acting very polite and helpful to the player. [[spoiler: The bad end has her return back to her normal look right before she kills you.]]

This build is meant to be a test for the upcoming Nightmare Mode of the main game. You can download it for free [[https://habupain.itch.io/saiko-no-sutoka-halloween-edition here.]]

!!This alpha contains examples of:
* AbductionIsLove: Saiko kidnaps Akira because she is obsessed with him and kills his friend Shinji out of jealousy.
* AbhorrentAdmirer: In the opening, Saiko holds Akira hostage because of her obsession to him. She even kills off a boy whom she caught her senpai talking to. One of the animated shorts revealed that [[spoiler:Akira actually felt repulsed that she even followed him to the restrooms]].

-->'''Saiko:''' ''[summing up her intentions]'' I will kill you.

-->'''Saiko''': [[SuspiciousVideoGameGenerosity I know you always wanted to escape]]. [[ExactWords Therefore... I decided to let you go.]]
* DidYouJustPunchOutCthulhu: Akira can literally throw a [[BoulderBludgeon brick]] at Yangire Saiko as an easy way to steal the exit key while she's knocked out, though that sets her off once she notices Akira grabbed the key.

* DoesThisRemindYouOfAnything: Saiko sometimes gives an ecstatic sigh and does a PalmOnCheekPose whenever the player notices her. The gasp sounds rather orgasmic.

Saiko No Sutoka (“Psycho Stalker”, as translated from Japanese) is a survival horror game developed by [[https://habupain.itch.io/ habupain]], in which concerns a high-school student named Akira who must find a way to escape his school during nighttime, all while getting hunted down by the eponymous [[{{Yandere}} Saiko-chan]], who has quite a bone to pick with him...

On November 22, 2022, a SpinOff was released called Saiko No Sutoka: [[HalloweenEpisode Halloween Edition]], where you are trying to escape a forest with the help of a zombified Saiko-chan. She needs help being put back together first though, and the two of you aren't alone in the forest...\\

** In the Good Ending: [[spoiler:Her death is presented as tragic. Her last moments spent [[AintTooProudToBeg begging]] Akira for help makes it clear that she knows she'll die and she's terrified. The Nightmare Mode implies that she came back to haunt him, asking why he didn’t save her from a tragic death]].

* ApologeticAttacker: Yandere Saiko seems less intent on killing Akira and usually switches in after her Yangire state has harmed him too much in order to try and save him with an apology and some healing medicine. This is also [[SomethingOnlyTheyWouldSay serves as a tell]], as a lack of apology by her is a sign that it's actually Yangire Saiko.

* BitchInSheepsClothing: [[spoiler:Saiko in Yandere mode.]] Super helpful of her to show you around the school looking for your friend, right? [[spoiler:Shame she's just doing to lure you into a trap. And unlike with Akira, [[AndNowForSomeoneCompletelyDifferent she has NO reason to keep Shinji alive.]]]]

* BoobyTrap: In Yandere Mode, Saiko [[spoiler:booby-traps the office with a gas bomb that can only be deactivated by shutting off the breaker panel in the Storage Room. The classrooms which contain the digits for the safe in the office are also rigged with gas bombs. Once she realizes the player foiled her trap, [[BerserkButton Saiko turns violent]]]].

* BoringButPractical: Walking. While running seems like a sensible thing to do when trying to escape from a knife-wielding psycho, doing this only results in giving Saiko a better idea of where you are, as she could hear the player's footsteps, before continually chase them down until they eventually make enough mistakes to die. However, with enough distance between the player and her, quickly sprinting around a corner and then walking after breaking line-of-sight causes her to immediately forget where the player is, giving them much more room to operate as she scutters off to other parts of the school.

* BoundAndGagged: Saiko kidnaps Akira in an attempt to induce StockholmSyndrome in him. To Saiko, AbductionIsLove, clearly showing off her yandere tendencies and killing Shinji out of jealousy. Judging by Saiko's comments in the intro, it's implied she also hates Akira dating other girls.

* CaptiveDate: In the intro, Akira wakes up to find Saiko holding him hostage and attempting to induce StockholmSyndrome in him before she leaves to kill his friend Shinji.

* ColorCodedForYourConvenience: The subtitles that appear are color coded to which mode Saiko is in. Crimson red is her default when she's in her murderous state, while her more 'helpful' disposition's subtitles are purplish. [[spoiler: Nightmare Mode has the subtitles appear in black and red.]]

* ComplexityAddiction: Saiko's plan in [[spoiler:Yandere Mode seems to be this. Shinji shows up at school looking for him,]] Saiko doesn't want that, so what's her solution? [[spoiler:Greet him when he arrives and walk him around the school pretending to help him, get him to turn on the power after it goes haywire, then trick him into going to the main office to trigger a smoke bomb trap when he opened the door. Following this, lure him to another room as he's dying from the gas to bait him into taking a drugged antidote, which causes him to pass out. She couldn't have possibly accounted for Akira trying to escape the locker he's in and knocking it over, but the trap's presence makes it clear she intended to lure his friend up there at some point with no reason to just not let him die from that.]] She clearly has fun doing things her way.

* CooldownHug: When Saiko began shifting to Yangire state, Akira can calm her down by either patting her on the head or caress her cheek to get her to return to her Yandere state, the comparatively less 'hostile' state. [[HopeSpot There is a chance of this being a fake-out, however.]]

* CruelAndUnusualDeath: [[spoiler:The bad endings in Normal or Hard modes, and all endings in the Yangire Mode are this. In Normal and Hard modes, Saiko beheads Akira, his last sight being that her red eyes looking at him. In Yangire Mode, his bad endings include being "let go" by Saiko after she decapitates him and throws his head out the school window, being cut in half with Saiko and Elissu dancing with his upper and lower halves respectively, managing to escape only to be knifed in the back, decapitated and his head put on a stuffed animal as Saiko and Elissu have a tea party with him.]]

* DangerousWindows: As Akira is barefoot, Saiko can break the glass window on a door to create a hazard that can hurt him whenever he walks over. It can be mitigated by wearing shoes to avoid being injured.
** In Yangire Mode, Saiko can ''smash through'' windows and in the hunt for Akira.

-->'''Saiko, summing up her intentions''': "I will kill you."

-->'''Saiko''': "[[SuspiciousVideoGameGenerosity I know you always wanted to escape.]] [[ExactWords Therefore... I decided to let you go.]]"

** Nightmare will be the hardest of all modes. [[spoiler:It will be [[EvilIsNotWellLit as dark as, if not darker than Yangire Mode]]. The subtitles are rendered black so you have a harder time knowing which mode Saiko is in, and ''she's invisible'', with the only way to see her is [[SeeTheInvisible the bloody footprints she leaves behind her]] and [[InvisibilityFlicker the brief moments she returns to visibility when she interacts with something]]. The game will also shift between "memories and realities" of previous modes to confuse the player and show that Akira has developed PTSD, experiencing flashbacks of the events that led to Saiko's death]].
* DisproportionateRetribution: The motivating factor behind Saiko killing Shinji and kidnapping Akira, possibly with the intent to do the same to them? A casual conversation.

* EntitledToHaveYou: Saiko feels entitled to Akira and holds him hostage so that she could have him for herself. She even kills Shinji who spoke to him just because she felt he was taking away the object of her affections. Judging by Saiko's comments, it's implied she also dislikes Akira dating other girls.
* EstablishingCharacterMoment: The alpha 1.9 version and all future updates (besides Yandere Mode) have an intro with Akira waking up tied to a chair and being greeted cheerfully by Saiko. She tells him it's night now, how she's been watching him sleep the whole time and assuring that she [[BlatantLies she would never hurt him.]] But then says "He" might if Akira doesn't behave, then that the thought of her senpai leaving her makes her feel "Him" start to come out and freezes up, before suddenly introducing herself to [[SplitPersonality Akira again with a wider smile and twitching a lot more, asking if they missed him]]. "He" quickly brings attention to the bloody knife Saiko is holding before threatening to use it to cut out Akira's tongue, which Saiko considers playing with before they change their mind to go kill Akira's friend, Shinji, whom he talked to earlier, promising to bring his head back to him before leaving. This pretty much tells you how much danger you're in and how completely bonkers Saiko is.

* EvilIsNotWellLit: The muted, blue lighting of the school and that it's completely empty (save for you and Saiko) gives off an eerie feeling of kenopsia. At times, Saiko will go to the Storage Room to to KillTheLights and possibly hide there to ambush the player.

* EvilSoundsDeep: In patch 2.2, Saiko and Elissu [[VoiceOfTheLegion reverberating vocal chords]] in Yangire mode.

* FailureIsTheOnlyOption: [[spoiler:As his endings reveal in the Yandere Mode, Shinji is always going to die. Going through with everything Saiko has him do ends up with him being decapitated. Even if he manages to escape, the new ending showcases him gloating about managing to leave...until Saiko manages to throw a vase on his head, instantly downing him and if it didn't kill him, he's definitely unable to move and thus easy pickings for Saiko.]]

** Played with. Regular Saiko, even while covered in blood from who knows where, still looks attractive, of all things considered. '''Yangire Mode Saiko''' on the other hand is whole other can of worms in that, while she's wearing what looks to be a PlayboyBunny outfit, her arms and legs are covered in cuts and scrapes, she's got GlowingEyesOfDoom and has glowing red paint on her face that makes her look like a female [[{{ComicBook/Batman}} Joker]]. Also, her voice has reverberating vocal chords.

** [[spoiler:One of the Yangire Mode endings show Saiko dropping a flower pot on Akira as he tries running away. The scene fades to black, and the viewer sees Saiko and Elissu having a tea party with decapitated Akira, [[CruelAndUnusualDeath whose his head is now on a stuffed animal]]]].
* ForDoomTheBellTolls: The ambient music when not being chased by Saiko is composed of eerie bell-like sounds.
** For Yangire mode, the bells go from ambient to playing a demented, twisted version of Entry of the Gladiators (the song often associated with big top circuses) to match Saiko's new glowing facepaint. It gets reversed when Elissu is the one chasing.

* GenreSavvy: Yangire Saiko. She disposes of Akira's shoes before the mode starts so that he has no way to protect himself from broken glass, will break through windows if he tries to lock her out of a room so that she can get around the usual kiting strategy, will camp at the exit both inside AND outside of rooms, strangles him from behind quickly enough that he can't struggle to escape her hold, carries multiple knives for throwing, and worst of all [[spoiler:already replaced the real exit key with a fake specifically for the purpose of luring Akira into a trap on the off chance he does manage to actually evade her long enough to collect the password around the school.]]

* GigglingVillain: Saiko likes doing this while within or just out of the player's sight just to get under his skin.

* GollumMadeMeDoIt: Subverted. [[NeverMyFault Saiko]] ''[[NeverMyFault tries]]'' [[NeverMyFault to pin the blame for her violent actions]] on her other personality in the game's opening, though it doesn't stop her from continuing to brandish a knife at the target of her affection, choking him if he turns his back to her, assaulting him for a key, or keeping him locked up with her against his will.

* HopeSpot: [[spoiler:Shinji's "good" ending. He manages to get the exit key, leaves the school while gloating about it. Saiko crashes it by literally crashing a vase atop his head, killing him. At the very least, he's knocked out cold and beheaded sometime after]].

* {{Hypocrite}}: Saiko is perfectly fine trolling Akira in her "nice" state, treating it as a game. Returning the favor causes her to whine about how she's being unfairly hurt before immediately becoming hostile.

* IHaveYouNowMyPretty: After she has captured Akira, Saiko makes it clear she has no intents of letting him leave.

* JustToyingWithThem: Saiko could easily run up and gut you without a word (in fact, when running at full speed she's faster than you can go at a full sprint), but instead will slowly approach while stating she's seen you. She'll also silently run up and hide behind you if your back is turned when she finds you, giggling and turning off the lights in classrooms you enter in an attempt to make you look behind yourself. She may corner you in a room but decide to shut the lights off and leave, only to stand outside the door and peering in at you; resuming the chase once you open the door. [[https://clips.twitch.tv/LittleYawningCockroachTriHard-N4cZaf2oElPqa2H_ She may even leave you alone after directly looking into a locker you're hiding in and stating she knows you're in there.]] She will stop doing this if she's sufficiently angered, however.

* HalloweenEpisode: The Halloween Edition spin-off has nothing to do with the main game (beyond the implication that, like the upcoming Nightmare Mode update, it's Akira having another nightmare). It involves Akira trying to get out of the forest with a zombie Saiko's help, while trying to keep her from eating him ''and'' fending off '''ANOTHER''' psycho yandere who's out for his blood.

* HalloweenEpisode: The Halloween Edition spin-off has nothing to do with the main game (beyond the implication that, like the upcoming Nightmare Mode update, it's Akira having another nightmare). It involves Akira trying to get out of the forest with a zombie Saiko's help, while trying to keep her from eating ''and'' fending off '''ANOTHER''' psycho yandere who's out for his blood.

On Nov.22, a SpinOff was released called Saiko No Sutoka: [[HalloweenEpisode Halloween Edition]], where you are trying to escape a forest with the help of a zombified Saiko-chan. She needs help being put back together first though, and the two of you aren't alone in the forest...\\

Saiko No Sutoka (“Psycho Stalker”, as translated from Japanese) is a survival horror game developed by [[https://habupain.itch.io/saiko-no-satuka habupain]], in which concerns a high-school student named Akira who must find a way to escape his school during nighttime, all while getting hunted down by the eponymous [[{{Yandere}} Saiko-chan]], who has quite a bone to pick with him...

* PeekABooCorpse: In Normal or Hard Modes, there's a chance that when you open a previously unopened locker, Shinji's headless corpse will come tumbling out, complete with ScareChord. There's also a chance you can find Shinji's severed head in an unopened cupboard, also with a ScareChord.

* RareGuns: The game has unused files for the Glock 18, the select-fire variant of the Glock handgun that is only available to police and military forces. [[spoiler:Originally, Saiko was to be gunned down by a cop, but that was changed to accidentally impaling herself as she tried to escape in Normal/Hard Modes]].

** Yangire ups the difficulty by having Saiko constantly be in her Yangire State, meaning she won't give you medicine or revert to a non-violent state after attacking you. You can then make it ''[[UpToEleven even harder]]'' by knocking over a picture frame in the office, which initiates Extreme Yangire mode and summons Saiko's twin sister Elissu.

** Her docile state is fond of this in gameplay. Turning your back on her results in her grabbing the player from behind and holding her knife to their neck before she eventually begins choking them. Resisting this causes her to fall to the ground, where [[{{Hypocrite}} she complains that you're hurting her.]] [[UpToEleven She then switches to her violent state and tries to stab you.]]

* GirlWithPsychoWeapon: No pun intended, Saiko is a psychotic, [[PsychoKnifeNut knife-wielding]] yandere. It's jacked UpToEleven when she's in Yangire mode.

** Yangire Mode takes it UpToEleven, what with a bloodshot red moon and the school being drenched with the stuff. Saiko and Elissu's eyes glow a constant red in contrast to the darkness. They also wear a reddish bunny outfit that is more FanDisservice, their limbs are covered in cuts and scrapes that are glowing, both dual-wield bloodied machetes, have glowing red paint on their face, and demonic sounding voices to unnerve Akira. Saiko and Elissu also have red subtitles, indicating they're in the permanent Yangire state.

* BerserkButton: Doing just about ''anything'' other than staying in the office at the start (Normal/Hard/Yangire), standing still while she's calm (Normal/Hard), or following her orders (Yandere) will result in her flying into a homicidal rage.
** [[TacticalDoorUse Shutting doors in her face causes her to threaten you regardless of what mode she's in.]] In alpha v.2.1, you can now lock yourself in a room, but she will kick the door down and forcefully barge in after pleading with you several times while in her docile state, thus eliminating that ability to evade Saiko.
** She also doesn't like it when you push her to the ground or shake her off your back.
** She doesn’t appreciate the player withholding keys from her or taking back keys she’s tried to steal. Notably, she will chase you down if she catches you with the exit key. If captured, she drags you to the office and decapitates you.
** Failing the circuit breaker minigame or inputting the wrong exit code also tends to draw her ire.
** Crouching next to Saiko causes her to believe you're looking up her skirt. If she is in Yandere state, she will immediately enter Yangire state. If she's in Yangire state, [[PervertRevengeMode she instead breaks your neck.]]
** In both Yandere and Yangire Mode, she immediately becomes murderous upon noticing you've stolen the key she has on her back, especially when she was knocked out momentarily by the brick (only during Yangire Mode).
** In Yandere Mode, she becomes murderous once she finds out you [[spoiler:deactivated the poison gas trap she set up in an attempt to lure Shinji by switching off the power]].
** She enters yangire state if Akira hands over her diary without the pages (which are scattered throughout the school) or with a few pages, tossing it aside as if it were garbage. She (incorrectly) assumes Akira deliberately ripped out the pages. [[spoiler:The dev stated that it was Shinji who pasted the diary's pages on random locations throughout the school [[KickTheDog just to humiliate Saiko]]]]. On the flip side, she does go cuckoo if Akira doesn't hand over the diary.

* GirlWithPsychoWeapon: No pun intended, Saiko is a psychotic, [[KnifeNut knife-wielding]] yandere. It's jacked UpToEleven when she's in Yangire mode.

* KnifeNut: Saiko's weapon of choice is a large bloody knife.

* WeaponOfChoice: Saiko is a KnifeNut.

* {{Meganekko}}: In Yandere Mode, she wears a pair of round glasses. She wears them as part of her MaskOfSanity.

* DoesNotLikeShoes: Saiko wanders barefoot throughout the school. The only mode where she actually has shoes is Yangire Mode.