FLANDRE In Embodiment of Scarlet Devil, she is described as being quite strange and eccentric, which makes it difficult for others to understand her. She's also described as being "normally docile" and generally pleasant to be around, but somewhat of a loose cannon if left unwatched. In Bohemian Archive in Japanese Red, it's suggested that she isn't very good at talking to other people, though she can get rather sassy and uppity when talking with her sister. Her friendship toward humans is very low. In Foul Detective Satori, her attitude was particularly impolite and informal, speaking in a very casual tone and generally doing as she wished without consideration of consequences, although she stopped short of seriously injuring anyone. In Sunken Fossil World, she appeared to only care about "destroying the indestructible" when facing off against Yuuma Toutetsu, although she did display a willingness to work with Okina Matara, insofar as it let her have some fun. Until the time when she met either Marisa Kirisame or Reimu Hakurei in Embodiment of Scarlet Devil, she claimed to not have seen any humans other than when they were prepared for a meal, although it's left vague as to whether that was her idea of a dark joke. During the events of Sunken Fossil World, however, she left the grounds of the Mansion for an extended period of time of her own accord to fight Yuuma Toutetsu, marking her first major departure from the grounds of the Mansion since her introduction. Abilities As a vampire, Flandre possesses superhuman capabilities just like Remilia Scarlet, such as enhanced physical strength, with the destructive power of oni and the nimbleness of tengu, as well as a vampire's bodily and regenerative ability. She can swing an oversized sword, though not as quickly as she would like to. Onami is a skunk girl tengu yokai pranking stubborn,one of Remilia&flandre valued with sakuya meiling and patchouli they are the colleages of inami in the mansion,expert for humiliate and giving that intruders a hard time, so remilia put her in charge of punishments of Meiling when she sleep or Flandre when she do a mess, It no use arguing onami. If her fluffy skunk tail lift it intimidating,girls are nervous knowing especially what's coming next,spray victim or thick yellow sulfur fog stink up for 24 hours&plants wilt. everyone smell it from far in making a wide detour... she work for Remilia since a lot of years 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). Patchouli is a magician (or witch) who is over 100 years old. As described in Perfect Memento in Strict Sense, she is the type of magician who was naturally born as a magician; rather than a human that has become a magician through training such as Alice Margatroid. She is "fairly short" and is around the height of Marisa and Youmu Konpaku. She stays confined to the library of the Scarlet Devil Mansion because the books and her hair are damaged by sunlight.Despite her enormous magic power, she has a weak constitution, has asthma, is anaemic and has vitamin A deficiency. Her physical ability is worse than that of humans. After the Scarlet Mist Incident during Embodiment of Scarlet Devil, she became somewhat more active. It was commented that Suika Ibuki's party at the shrine was enjoyable for her. In Silent Sinner in Blue, she said that she herself came to the shrine to pull an omikuji. Incidentally, the result of the omikuji was "future blessing" (末吉), though it seemed to have been something prepared by Marisa. It is noted by Reimu that she tends to have bad luck. Personality Patchouli is known to be highly capable, experienced and studious magician, usually found researching the countless tomes within the house library. However, her great abilities are offset by her poor health caused by long-time recluse and asthma. She doesn't have a very proactive personality but rather always walks her own path. However, she's always interested where knowledge is concerned and will proactively go and try to acquire it. She does everything by the book but still makes a lot of mistakes. She's also described as very dark and taciturn, which in this case means she is introverted and silent in expression and manner. She’s very friendly with remilia at point of Remilia and flandre call her "patchy" and patchouli call Remilia "remi" Koakuma has a capricious, mischievous personality and doesn't think of consequences, similar in many ways to Daiyousei, she endearing with patchouli and take her role in the library with serious and amusement but been something scolded by patchouli for some antics

In Gensokyo, the sky becomes covered in red mist, blocking the sun in the middle of summertime, which becomes known as the Scarlet Mist Incident (紅霧異変). Reimu becomes determined to find the cause of the red mist, as if left alone, the mist would spread across Gensokyo's border to the human world. Marisa hopes that the individual responsible for the mist would have valuable items to collect. Reimu and marisa coming from the direction of the Misty Lake (霧の湖). Travelling in that direction, she encounters the yōkai Rumia, and later the ice fairy Cirno, determining neither are related to the mist – instead, the Scarlet Devil Mansion (紅魔館), which seemingly appears from nowhere, is discovered to be the cause. The mansion's guard, Hong Meiling; resident anemic witch, Patchouli Knowledge; the skunk tengu onami kusaïni; and time-stopping maid, Sakuya Izayoi, all attempt and stop the intruder from reaching the mistress of the mansion, Remilia Scarlet