PEOPLE WHO TRY TO RESOLVE THE INCIDENT ALICE Alice Margatroid is one of the few people known to live within the Forest of Magic. She's a Magician known primarily for her skillful use of dolls, as well as being a loner. She gets in many fights with Marisa but they are somewhat acquaintances, sharing many of the same interests and even teaming up during Imperishable Night and Subterranean Animism. MARISA Marisa is an outgoing and informal person. Hieda no Akyuu states that her personality is condescending, but she has a sophisticated side to her that tends to be interesting. She socializes with many inhabitants of Gensokyo and is friendly to both human and non-humans individuals. She's quick to act if she hears or sees anything interesting, sometimes doing dangerous things to satiate her interest at the time like when she follows an eagle on a whim in the middle of a blizzard. She speaks in an informal manner and typically uses the sentence ending particle da-ze~ (ぜ). REIMU Reimu is defined as unusually easygoing, lacking any sense of danger, and being carefree. She is described as simpleminded, always showing her true feelings and acting on whatever ideas she thinks, She can also be emotional and noisy, and her presence is well known wherever she is, but she can also merge into her surroundings quite easily when necessary. She is portrayed as someone simple who passes her days sweeping the shrine grounds, drinking green tea and lazing about YUKARI YAKUMO An often seen and referenced character, Yukari Yakumo is the youkai of boundaries. She was first introduced in Perfect Cherry Blossom as the sleepy mistress of Ran Yakumo. During Imperishable Night, Yukari teams up with Reimu to find those responsible for the fake moon. In Immaterial and Missing Power, she actually sings her way from battle to battle, stealing everyone's sake, wine, and brandy, even right from the shrine's altar. However, this is all part of her strategy to save the day. Story Over a thousand years ago, Yukari organized an army of youkai and led them in an invasion of the Moon. The youkai were subsequently routed by the Lunarians, who possessed superior technology and magic, and was forced to retreat to Earth. Since that time, no youkai have attempted to expand their territory beyond Gensokyo. While some speculate that Yukari organized the invasion out of selfish hunger for territory and power, others believe she did it to teach the youkai a lesson about starting wars of conquest; namely, that it was a bad idea. About a thousand years ago, Yukari met and became friends with a human girl named Yuyuko. After Yuyuko died, Yukari continued to be friends with Yuyuko's ghost, although Yuyuko gradually forgot who she had been and why she had died. In Perfect Cherry Blossom, Yuyuko requested that Yukari use her power to weaken the border between the Netherworld and Gensokyo, Yukari obliged. She knew Yuyuko's plan to make the Saigyou Ayakashi bloom could never succeed, but was too busy sleeping to say or do anything about it, or to put the border back to normal after everything was finished, which put her on a collision course with the heroines. Yukari is known for being a very youkai-like youkai who sleeps all day and lives for the enjoyment of life. Though she rarely leaves her house, she's well-connected and is acquainted with most of the most powerful youkai, such as Suika and Yuyuko, as well as anyone having anything to do with the Hakurei border or outside world (Reimu and Rinnosuke). She's possibly the most powerful youkai in Gensokyo, and has a tendency to toy with her opponents rather than use her full power from the start. She often has a great deal of insight and understanding about whatever happens in Gensokyo, and possesses considerable intellectual prowess as well. Though she seems flaky and unreliable most of the time, when the safety or security of Gensokyo is at stake, she won't hesitate to get involved, even if it means using others to do the work for her. For example, in Scarlet Weather Rhapsody, she treats Tenshi Hinanawi with much hostility after finding out the plot of the Heavens. She could easily be either a villain or a heroine, depending on her whims. REMILIA While she tries to cultivate the image of a mysterious and frightening vampire aristocrat, she is surprisingly polite. Her long lifetime has only served to make her prone to boredom and as a result she prizes anything she finds novel, frequently indulging her own childish whims in order to create entertainment for herself. In Silent Sinner in Blue she allows herself to be manipulated by Yukari Yakumo, simply because the alternative would have been boring. The other residents of the Scarlet Devil Mansion spend much of their time catering to Remilia's odd whims (including numerous parties), though she does make an effort to appreciate and respect their patience. Remilia is respected by most youkai of Gensokyo and so she's said to have a charismatic personality. However, in reality this is only because of the fear they have for her kind. While she can act in an overblown and grandiose fashion, she usually only does it during incidents or for important matters. Otherwise, she tends to exhibit childish behavior. She enjoys novel things and isn't above playing along in silly games Sakuya personality seems perfect and elegant, being a fairly serious person overall, as befitting of a maid. Although due to the nature of the mistress of the house, it is arguable whether she serves the role of a maid or a babysitter. Sometimes she shows a more spaced-out and airheaded side, and can be surprisingly unreliable. She's polite and pleasant towards to her mistress Remilia Scarlet and those she's close with, such as Patchouli Knowledge, while being less formal with other people. PEOPLE WHO TRY TO TRIGGER THE INCIDENT REISEN  Reisen is described as changing her personality completely to match her circumstances. Ordinarily timid and sometimes showing a scatterbrained side, she can be both carefree and crazed, and is a different person in battle. Indeed, ZUN states that her uniform is to give the impression of an inconsistent personality. As she is not originally from the Earth, she has never been friendly and cannot get along with humans very well. Watatsuki no Toyohime, when commenting on Reisen's abandonment of the moon, states that that she was both self centered and cowardly, poor traits for a soldier in the Lunar Defense Corps. Eiki Shiki additionally affirms this by stating Reisen's sin is that of selfishness due to abandoning her allies, something Reisen states she is "earnestly trying her best" to fix. Later on in Forbidden Scrollery, she is seen peddling medicine for the Human Village, and invented a device to repel rats to assist with the Human Village's rat problem, without input or permission from her master Eirin Yagokoro. Reisen states that because her and the residents of Eientei are outsiders to Gensokyo, they should aim to be "productive members of society", as isolating themselves by aggravating others would be a bad idea. TEWI Tewi is described as being more like a fairy than youkai, with being childish in her way of speaking and acting; specially with Reisen, who is the target of her pranks and she hides from the moon rabbit to annoy her. Despite her childish appearance, she is one of the oldest Youkai in Gensokyo who has lived for more than 1,000 years before the first Gensokyo Chronicle was written (if she really was the White Rabbit of Inaba, she would have existed since the early of 8th century) and is very wise and cunning. It is also noted that she doesn't care about selling her own species to humans if she knows that they will abandon them; which would make the rabbits become youkai too.Tewi is a very lighthearted and playful youkai, and is known to lie at times. In Phantasmagoria of Flower View, she even tries to swindle Aya Shameimaru out of some pocket change. EIRIN Eirin Yagokoro is a genius of medicine from the Moon, and is able to create the Hourai Elixir. She is living in exile in Gensokyo after choosing to stay with and devote herself to Kaguya Houraisan on Earth rather than take her back to the Moon. She was a very well-known figure on the Moon, having not only been instrumental in the founding of Lunar society with Lord Tsukuyomi, but also being its leading medical mind and the person in charge of the Moon's emissaries to the Earth. It seems that now Eirin has begun using her knowledge of medicine to act as Gensokyo's premier pharmacist, selling medicines at Eientei ranging from sleep aids to various cures. She is generally a fairly pleasant person and is devoted to serving her best friend, Kaguya, but she does not suffer fools gladly, and because of her incredibly high intelligence, she can come across as conceited, impatient, and condescending at times to those not sharp enough to follow her explanations immediately. Story During the events of Imperishable Night, Eirin attempted to seal the passage between the Earth and Moon, which becomes open during full moons, by casting a spell that would seal the Earth inside a chamber (similar to a Chinese folktale about a paradise found inside a pot). She only meant to do this to protect both Kaguya and Reisen so that the emissaries coming from the Moon wouldn't be able to reach them, but this did not go unnoticed by the various Youkai in Gensokyo who enjoy the moonlight. Kaguya Houraisan (蓬莱山　輝夜 Houraisan Kaguya) is an immortal Lunarian who was once a princess of the Lunarians of the Lunar Capital on the Moon. She had Eirin Yagokoro create the Hourai Elixir with the help of Kaguya's power to control eternity which lead to her being exiled to Earth. After liking her life on Earth, she and Eirin choose to not go back to the Lunar Capital and resided for thousands of years in Eientei within the Bamboo Forest of the Lost that is now in Gensokyo. Kaguya first appeared as the true Stage 6 boss and one of the main antagonists of Imperishable Night. Personality She is also described as haughty and relatively wild, often sneaking out to visit the human village. She apparently is refined in the art of conversation, but her vocabulary is a bit dated. Abilities Manipulating eternity and the instantaneous Eternity is namely immutability, and it can be said that eternity rejects all change. Things that possess eternity indefinitely do not change, and also cannot be interfered with by things outside of themselves. By using her ability on everything in Eientei, she made it so that living things stopped aging, objects would never break, and food would never spoil.[5] Additionally, beginning from when Kaguya came to Gensokyo, she lived hidden away for a thousand years in the interior of the Bamboo Forest of the Lost without anybody knowing about her. Also, the pure Japanese-style mansion in Eientei can be seen not to have worn out at all, which can be said to have been due to this ability of eternity. After the Eternal Night incident, Kaguya removed the spell of eternity from Eientei, causing objects to break as normal, living things to age again, and food to spoil if not eaten in time. Incidentally, as the Hourai Elixir made by Kaguya's ability of eternity is something that makes the consumer have a "body that rejects all change," it can simply be said to be a kind of maximised, self-healing ability (due to this, it is said that the entire body can recover from just a single hair left intact, as shown in the case of Fujiwara no Mokou). In the last spell card "End of Imperishable Night" which used this ability, it destroyed Reimu Hakurei and the others' spell of eternity, and forcibly called for dawn (End of Imperishable Night -Rising World-, where "Rising World" was a homophone to "dawn" as "yoake" (夜明け)). On the other hand, Kaguya, in being able to manipulate the instantaneous, is able to alter the needed "instants" and make them her own time. However, whatever she gathers together—since it is made up of many "unrecognisable instants" that cannot be changed—has no means of being known about. For this reason, in manipulating the instantaneous, Kaguya is able to spend "time the same as others'" and "time different from others'" simultaneously. Hieda no Akyuu presented this as "having parallel timelines at the same time." In the nineteenth chapter of Silent Sinner in Blue, as the instantaneous is the smallest unit of time, time is able to accumulate countless instants. Watatsuki no Toyohime explained that to see time as continuous is due to the inability to recognise the instant. Since her ability can be said to be the ability to manipulate "complete stop = eternity" and "extreme speed-up = instant", Akyuu also summarised it as an "ability to manipulate time". This seems very similar to Sakuya Izayoi's "ability to manipulate time."

The Imperishable Night incident started, making Gensokyo in a eternal night but marisa and alice who haved pass by the human village in meeting keine, on the advice of her last marisa and alice going into the bamboo forest of the Lost, after a fight between marisa and reimu they haved discover a strange manor in the bamboo forest of the Lost with reisen the rabbit youkai gardian of the manor, so reimu marisa alice and Yukari are okay to be splitting in two group the group of alice and Yukari defeated reisen and reimu with marisa continue in the hallway, but been trapped by tewi the rabbit youkai and floating into space, reimu&marisa fighting eirin the servant of the princess kaguya