History Characters / TouhouSideGames

* RunicMagic: Her cloak's interior is lined with runes that move in her fighting game sprites. In the manga she appears however, it's always static and in one place.

* IdenticalAncestor: Almost certainly an ancestor of [[Music/TouhouZUNsMusicCollection Renko Usami]], and apart from their physical resemblance she also has similar fashion sense - she wears an identical hat, a cloak that resembles Renko's skirt and capelet, and has a hexagram in her design (on the back of her tablet computer[[note]]Renko has a hexagram on her tie clip[[/note]]).

* GameplayandStorySegregation: During Koishi's arc in Urban Legend in Limbo, she shows Sumireko's cellphone to her sister Satori after battling her, meaning that she managed to snatched it after defeating her. However, in Sumireko's arc, after defeating her enemy, she shows her cellphone to take a selfie, meaning that she neither managed to get her phone back from Koishi offscreen, or she just had a spare one.

The goddess of pestilences, and Shion's younger twin sister. Her ability allows her to consume the financial assets of whomever she chooses.

The goddess of poverty, and Jo'on's older twin sister. Her ability allows her to cause others to become unlucky, including herself.

* StrongerSibling: Jo'on might be the face of the duo and do most of the fighting, but Shion is actually the more powerful of the two due to her powers over luck. This is an inversion of how the younger siblings in ''Touhou'' tend to be the strongest.[[note]]The other example of this is Gengetsu to Mugetsu in ''Lotus Land Story''.[[/note]]

* IJustWantToBeSpecial: Technically she already ''was'' special due to having PsychicPowers, but in middle school she came down with a textbook case of [[http://en.dic.pixiv.net/a/Chuunibyou chuunibyou]], becoming obsessed with the occult and other worlds and refusing to make friends with others.

::''Expose the Esoteric! The First President of the Sealing Club!''

A high-school student from the outside world who has psychic powers. She initially tries to breach Gensokyo's barrier from the outside world, which eventually causes the events in ''Urban Legend in Limbo''. At the end of the game, she discovers that she's able to enter Gensokyo through her dreams. Sumireko appears to have some sort of connection to [[Music/TouhouZUNsMusicCollection Renko Usami]]; while nothing has been confirmed, she's heavily implied to be Renko's ancestor, being the founder of the Sealing Club that Renko and Maribel are part of.

* ClubStub: Founder of the Sealing Club, and its only member. Explained as her deliberately creating a club which no one else would be interested in as an excuse to drive people away.

* RunicMagic: Her cloak's interior is lined with runes that move in her fighting game sprites.

* {{Leitmotif}}: [[https://www.youtube.com/watch?v=pcobOGPSDz4 "Onigashima in the Fairyland ~ Missing Power"]] in ''Immaterial and Missing Power'' and [[https://www.youtube.com/watch?v=jXIy17nhPUU "Broken Moon"]] in ''Scarlet Weather Rhapsody.''

* NerdGlasses: She wears a pair of red, Half Moon glasses and she's an occulist nerd. In the fighting games, they become OpaqueNerdGlasses when she gets dizzy.

* MagicalFloatingShawl: Iku is a messenger of the Dragon Palace, whose job is to observe the daily mood of the atmosphere. She has frilly white mantle that resembles a hagoromo and floats around her body. Rumor says that if a human wears this clothing, they will be able to fly through the sky.

* ShockAndAwe: Has lightning powers.

* RememberTheNewGuy: ''Unfinished Dream of All Living Ghost'' reveals that she and Ran knew one another long before the latter became Yukari's shikigami.

* ConnectedAllAlong: ''Unfinished Dream of All Living Ghost'' reveals that she and Ran knew one another long before the latter became Yukari's shikigami.

* BadassCape: Lined with runes. Her sprite gives it a scrolling UnmovingPlaid effect like Utsuho and Miko, though her portrait suggests the runes are simply sewn on. Same with her sprites in ''Violet Detector''.

* IWorkAlone: Despite having numerous underlings, she prefers doing her own thing and doesn't believe in getting or receiving help. This philosophy that has trickled down to the Gouyoku Alliance as a whole since they'll do whatever they want.

* IWorkAlone: Despite having numerous underlings, she prefers to work on her own, a philosophy that has trickled down to the Gouyoku Alliance as a whole since they'll do whatever they want.

* CarFu: One of her attacks has her summon a mechanical panda ride, and ramming it at the opponent.

* PandaingToTheAudience: One of her attacks has her summon a mechanical panda ride, and ramming it at the opponent.

* ShoutOut: Whenever she uses some attacks, she strikes a pose similar to ''Anime/GreatMazinger''[='=]s Thunder Break attack. She also fights with a scarf and has attacks with spark effects, much like Lisa Lisa from Part 2 of ''Manga/JoJosBizarreAdventure''.

* SpannerInTheWorks: Manages to derail Zanmu's plot by telling Reimu to travel to Hell instead of wasting her time going to the Animal Realm.

* OddFriendship: Starts up a strong friendship with Miyoi, a shy, meek Zaraki-warashi, and helps her start up Geidontei's second role as a night-pub for Youkai.

* SuperSmoke: Part of her density powers. She's used this form to attack several bystanders in ''Manga/WildAndHornedHermit''.

'''Windows Era -- Main Games:''' ''Characters/TouhouKoumakyouTheEmbodimentOfScarletDevil'' | ''Characters/TouhouYouyoumuPerfectCherryBlossom'' | ''Characters/TouhouEiyashouImperishableNight'' | ''Characters/TouhouKaeidzukaPhantasmagoriaOfFlowerView'' | ''Characters/TouhouFuujinrokuMountainOfFaith'' | ''Characters/TouhouChireidenSubterraneanAnimism'' | ''Characters/TouhouSeirensenUndefinedFantasticObject'' | ''Characters/TouhouShinreibyouTenDesires'' | ''Characters/TouhouKishinjouDoubleDealingCharacter'' | ''Characters/TouhouKanjudenLegacyOfLunaticKingdom'' | ''Characters/TouhouTenkuushouHiddenStarInFourSeasons'' | ''Characters/TouhouKikeijuuWilyBeastAndWeakestCreature'' | ''Characters/TouhouKouryuudouUnconnectedMarketeers''\\

* MainCharacterFinalBoss: For all of ''Violet Detector'', you play as Sumireko. The catch? [[spoiler:At the very end of the game, it is revealed that the Sumireko you’ve been using is her Dream Self, believing herself to be the true Sumireko by mistake, after having evaded and defeated most of the other Dream Selves. In the final stretch of the game, the real one appears with Okina, & the hidden god strips away all of the powers of the Dream Self before leaving the Sumirekos to their devices, with you now in control of the true one.]]

** Strikes one with Mokou during the events of ''Urban Legend in Limbo,'' mainly due to both being impressed by the other's power despite Mokou being annoyed with Sumireko's arrogance at first. Sumireko even tears up when the Occult Ball's powers run out and force them apart, ending their battle prematurely.
** Sumireko also mentions in ''Alternative Facts in Eastern Utopia'' that Mamizou comes over to the Outside World from time to time to visit her.

* NerdGlasses: A pair of red, Half Moon glasses. In the fighting games, they become OpaqueNerdGlasses when she gets dizzy.

* OrdinaryHighSchoolStudent: [=WaHH=] refers to her as being one before the events in ''Urban Legend in Limbo'' [[spoiler:left her with a condition that made her visit Gensokyo whenever she goes to sleep]]. Considering that she had PsychicPowers before she first visited Gensokyo, however, it's a little questionable how ordinary she really was.

* SquishyWizard: Sumireko is quite weak physically as a result of being a 15-16 year old girl with no martial arts training; one of her normal moves is a mewling paw attack and her other physical attack is a hip check. She relies heavily on her psychic abilities to defend herself and most of her other normal attacks involve throwing physical objects.

* SuperpowerLottery: She has the widest range of powers out of any character thus far. She's been shown to have [[PowerFloats levitation]], PsychicTeleportation, [[PlayingWithFire pyrokinesis]], [[MakingASplash hydrokinesis]], and [[MindOverMatter psychokinesis]]. And it's very possible that this isn't her extent.

* TsurimeEyes: Is drawn with these in ''Wild and Horned Hermit'' to signify her prideful nature.

* ScarfOfAsskicking: Literally, since she ''weaponizes'' it.

* DoesNotLikeShoes: Goes around barefoot.

* BladeOnAStick: She wields a Naginata (Japanese polearm) in some of her attacks.