If one refers to vampires that are known to exist in Gensokyo, they must be the Scarlet family living in the Scarlet Devil Mansion.

Its mistress is the Scarlet Devil (*1), Remilia Scarlet.

Her appearance and behavior might seem childish, but she has actually lived for more than 500 years and possesses amazing physical powers, as vampires do.

She's short and looks as a little girl under the age of ten, but she has wings with a span wider than her height, and by looking at her silhouette, she may seem quite large.

Her ego is large as well.

Her actions are similarly childlike, and combined with her amazing strength and inexhaustible curiosity make her a fearsome devil that may explode at any time.

She sleeps during the day in the Scarlet Devil Mansion. At night, she takes walks or hosts a party and has as much fun as she can before becoming tired and returning to her slumber.

It is not sure whether or not she is using her ability to manipulate fate consciously, but it is said misfortune will befall those who are merely in her vicinity, and she can cause great change in the state of the daily lives of others with but a word.

For example, becoming more likely to encounter rare things (*2).

1: She was called the Scarlet Devil before coming to Gensokyo. This came from the fact that she often spills blood and stains her white clothes.

2: Actual results may vary, but there are no visual indication of when her ability is in effect.

This incident led to many humans learning of the existence of the Scarlet Devil Mansion.

There was an incident where Gensokyo was shrouded in a deep red mist so the sunlight could not reach the Earth, leading to a summer with low temperatures.

Inhaling the mist worsen the condition of those who did so, and led to people being unable to leave not only the human village, but even their homes over the course of the next several days.

It was Remilia behind the appearance of this mist, with the selfish intent of blocking the sunlight so that she could remain active during the day as well.

It's said that in the end, the shrine maiden of the Hakurei Shrine punished her to bring an end this incident.

"I saw her at a cherry blossom-viewing party. She was using a parasol. If she's weak to sunlight, why doesn't she wait until night?" (Anonymous)

She is a vampire who is often spotted in the daytime as well.

It seems that parasols are ideal in blocking ultraviolet rays.

"I saw her at a cherry blossom-viewing party at night. I guess she does it then since she's weak to sunlight." (Anonymous)

Rather, it is highly possible she was at viewing parties for the entire day.

"I was wounded and could barely move, but someone from the Scarlet Devil Mansion helped me and let me lodge in. They call it the Devil's Mansion, but she was unexpectedly kind. However, there wasn't anything much to eat, and since it was very noisy during the night, I couldn't sleep, so I ran away as soon as I could." (Anonymous)

Vampires are surprisingly polite.

Especially since they try not to eat the humans in Gensokyo.

However, it might be that your fate to 'die like an animal' had been altered (*3).

3: Depending on how she changed fate, you might even become a half-human, half-youkai.

Although she is a youkai with many weak points, it is not a good idea to exploit them and agitate her.

Since she cannot be exterminated under normal circumstances, you will most likely anger her and simply be blown away.

Since she has abundant curiosity, she may choose to invite humans to her parties or play in the human villages on a whim.

However, because she is childish, you must be careful not to render her in a bad mood. Otherwise, there may be terrifying consequences.

You will have to put up with her selfishness.

She thinks that nobody is superior to her, not only among humans but among youkai as well.

Because of her haughty attitude, she is friendly to none.