''Gensou Shoujo Taisen'' ("Fantasy Maiden Wars") is a ''VideoGame/{{Touhou}}'' {{doujin}} game series in the spirit of the popular ''VideoGame/SuperRobotWars'' games, created by Sanbondo. The game is divided into four parts (three of which have been released so far), and loosely retells the story of every Touhou game from the 6th through the 12th, while attempting to create a more unified story between all of them.

The first part, ''Kou'' (Scarlet), retells the story of ''Embodiment of Scarlet Devil'' and has been translated into English by Deranged. The patch can be found [[ here]]. The second part, ''You'' (Mystic), combines ''Mountain of Faith'' and ''Perfect Cherry Blossom'', and the third part, ''Ei'' (Eternal), combines ''Imperishable Night'' with ''Subterranean Animism''.

!!This series contains examples of:

* AntiFrustrationFeatures: From ''You'' onwards, having allied units shot down no longer penalizes your acquired funds, after all, [[NintendoHard you're going to need every Point you can get]].
* BackgroundMusicOverride: Like in SRW, bosses will always have their theme play during battle and certain stages play special music that continues over the regular battles. Also, certain attacks such as Reimu's Fantasy Seal or Marisa's Master Spark have their own themes that play over even boss themes.
* BigDamnHeroes: Prevalent all throughout the games. In particular, the Scarlet Devil Mansion's inhabitants tend to show up as reinforcements during climactic battles. In ''Kou'', [[spoiler:Sakuya appears to assist you on Remila's orders when fighting Flan]]. In ''You'', [[spoiler:Patchouli and Koakuma show up to lend their aid against Sanae]] and in ''Ei'', [[spoiler:Remilia flies in to save Sakuya when fighting Eirin]].)
* TheCavalry: [[spoiler:Mima]] appears to save Marisa in the Underground.
* TheChessmaster: [[spoiler:Kanako and Suwako]] appear only in cutscenes in ''Kou'', seemingly planning their move for ''You''.
* CombinationAttack: Marisa and Alice's [[FanNickname Malice Cannon]]. ''You'' adds a Reimu/Marisa combination as well.
* CombiningMecha: After being defeated individually, the Prismriver Sisters huddle together to become a single unit, which is treated mechanically like an SRW CombiningMecha. [[spoiler:This results in the Three Fairies of Light deciding to "combine" as well... in a scene which parodies ''TengenToppaGurrenLagann''.]]
* ContinuityPorn: The game blends the story of the official Touhou games, including the PC-98 continuity, into one.
* CooldownHug: Happens ''twice'' in ''Ei'', first with [[spoiler:Remilia hugging a berserk Flandre in a special attack-animation cutscene, and later with Rin and Utsuho, although the latter only partially succeeded because Utsuho's power was no longer under her control even after she regained awareness.]]
* CulturalTranslation: The subtitles "Kou", "You", and "Ei" come from "'''Kou'''makyou", "'''You'''youmu", and "'''Ei'''yashou", the Japanese parts of the first three Windows Touhou games' names (which are relatively obscure in the English fanbase). The FanTranslation renders them as "E" and "P", from their English portions, "'''E'''mbodiment of Scarlet Devil" and "'''P'''erfect Cherry Blossom", which more closely fits the naming scheme of the ''VideoGame/SuperRobotWars'' games.
* DefeatMeansFriendship: A majority of your units are recruited only after you defeat them in battle.
* DiscOneFinalBoss: [[spoiler:Remilia]] in ''Kou''. [[spoiler:Kanako and Suwako]] in ''You''. [[spoiler:Eirin and Kaguya in ''Ei'']].
* TheDreaded: [[spoiler:Yuuka.]] And if you attack her, you'll see just why everyone is afraid of her.
** [[spoiler:If you're feeling gutsy, have Marisa attack her with Master Spark.]]
** In ''Ei'', the party has a similar reaction to [[spoiler:Yorihime.]]
* DualBoss: Minoriko and Shizuha, [[spoiler:Kanako and Suwako.]]
** WolfpackBoss: The three Fairies, [[spoiler:The Prismriver Sisters.]]
* EleventhHourRanger: [[spoiler:Sakuya]] in ''Kou''. [[spoiler:Youmu]] in ''You''. Both [[spoiler:Rin and Nue]] in ''Ei'', one of whom has a special ability specifically designed to counter the final boss.
* EleventhHourSuperpower: [[spoiler:Reimu and Marisa CombinationAttack in ''You'']] is acquired two scenes before the last boss.
** In ''Ei'', [[spoiler:Reimu acquires the new spellcard "Fantasy Nature" just in time to stop [[HopelessBossFight Yorihime]] from defeating the party.]]
* FelonyMisdemeanor: Sanae interrupts a party at the Hakurei Shrine to reveal a "shocking secret" about Reimu which will break everyone's trust in her forever. [[ The reaction was not what she was expecting.]]
* FinalBoss: [[spoiler:Flandre]] in ''Kou''. [[spoiler:Yukari]] in ''You''. [[spoiler:Utsuho]] in ''Ei''.
** FinalBossPreview: You meet [[spoiler:Flandre]] as an NPC as Marisa. [[spoiler:You can beat her, if you can take her down with Marisa only.]] You also meet [[spoiler:a pre-powered up version of Utsuho as one of the weakest bosses in the game, to foreshadow her character development.]]
%%* FragileSpeedster: Reimu, most Small size units, [[spoiler:Aya]].
%%* GlassCannon: Marisa, Sakuya. Taking after [[Manga/GetterRobo Shin Getter 1]], [[spoiler: Flan falls under this too.]]
* {{Leitmotif}}: Everyone has at least one. Sakuya, Nitori, [[spoiler: Youmu, Aya and Sanae]] have different ones both as an enemy and as an ally. The three fairies gain one for their CombinationAttack [[spoiler: and another one in CombiningMecha form.]]
* HopelessBossFight: The fight with [[spoiler:Yorihime]] in ''Ei'', if you choose the dialog options that let her use her full power on you. She has enough evasion to dodge anything but an AlwaysAccurateAttack, and can attack more than once per turn with attacks that exceed the game's accuracy limit. However, you can time out all her cards and beat the mission by running away.
* LightningBruiser: [[spoiler:Suika.]]
* LordBritishPostulate: In ''Kou'', it's possible to defeat Sakuya in chapter 5 and Sanae in chapter 7 if you can reduce their HP to zero in one hit without going below a certain threshold beforehand. They'll still escape as per the story, but you'll get items and EXP and such for a boss kill.
** In ''Ei'', when you fight the protagonist you didn't choose, your objective is only to shoot down Reimu/Marisa; however, the more powerful characters such as Yukari and Yuyuko/Yuuka and Mima will sit in the back and not engage your units unless you pursue them.
* LordErrorProne: Sanae, to a hilarious extent.
* {{Medley}}: The last stage track in ''Kou'' contains fragments of ''every single stage theme'' from Embodiment of Scarlet Devil, plus the title screen theme.
** The last stage of ''You'' does the same thing with songs from Perfect Cherry Blossom.
** Similarly, the stage theme for the final battle of Eientei in ''Ei'' the stage themes of Imperishable Night. [[spoiler: Though it's not the final stage this time.]]
* MagikarpPower: Two examples in ''You''
** When Lily White joins your team she has only a single attack, low stats, and is practically an EmotionlessGirl; she powers up (and [[GenkiGirl brightens up]]) significantly once you get closer to where all the Spring was taken.
** The Three Fairies of Light increase in power [[spoiler:by learning how to [[CombiningMecha group together into a single unit with the sum of their stats]]]].
* MauveShirt: Tengu A, Tengu B and Kappa C in ''You'', three recurring enemies who are identical to standard {{Mooks}} of their species but have a few lines of dialogue and slightly higher stats. Kappa C stands out for also [[CharClone being red rather than blue like the other kappa, and claiming to be three times faster]].
* MidseasonUpgrade: Nitori upgrades to [[Franchise/{{Gundam}} Full Armor Nitori]] in ''You'', which gives her MoreDakka and a {{BFG}} WaveMotionGun. [[MechaExpansionPack The upgrades can be removed if you want Nitori to take up less space in your team.]]
** Both Reimu and Marisa change sprites and movesets (and theme music) partway through ''Ei'', just in time to use them against each other in the obligatory LetsYouAndHimFight from ''Imperishable Night'' stage 4.
%%* MightyGlacier: Most large size units.
* NiceJobFixingItVillain: In ''You'', the heroes are gathering allies to help them against the forces of Yokai mountain, Reimu and Keine asking Mokou, and Marisa and Alice asking the Scarlet Devil Mansion. However, the tengu tailing them decide to attack and make the respective people change their minds.
* NintendoHard: When its harder difficulty levels boast to have the same level of difficulty as the classic SRW games, you know you're going to catch hell. Also a partial case of IdiosyncraticDifficultyLevels
** In contrast Easy and Normal compare themselves to more modern games, Alpha and Alpha Gaiden.
* ReadingsAreOffTheScale: Any enemy unit whose current HP is exceeds 10,000 will have both their current and max HP values replaced with question marks. Their health bar still shows the percentage of their health, though.
** Some of the older Super Robot Wars game did that too so it might have been done on purpose.
** This happens in the plot as well when Keine measures Yorihime's spiritual energy after letting her use all her power.
* RecycledInSpace: Lampshaded in ''Ei'', chapter 48, which is titled "Gensou IN SPACE". Naturally this chapter is when the party [[spoiler:visits the moon]].
* ShoutOut: ''Tons'', to ''VideoGame/SuperRobotWars'' itself as well as the countless mecha shows featured in the series, ranging from character dialogue, attack animations, to even musical nods.
* TheStinger: ''You'' has one where [[spoiler: Marisa helps Nazrin and Shou find the Palanquin Ship.]]
* SuspiciouslySimilarSong: Much of the game's soundtrack consists of Touhou tracks mixed to sound like particular SRW or mecha anime tracks.
* UnexpectedCharacter: [[spoiler:Elly and Kurumi. Shou and Nazrin in the second game.]]