Spider Demon (Daughter)

The Older Sister Spider Demon (「」) was a member of the Spider Family.

Appearance
Her physical features are similar to that of her "Younger Brother" Rui, completely milky pale white skin complexion with snow white hair, her eyes are pure white with only her silvery pupils separating them from her sclera, she also possess several red dot like patterns in her face similar to her "Family". Her original appearance as a demon was completely different than her current, having morphed and changed her features due to being forced by Rui to be a family, her original appearance was simple, having black hair and slitted cat like eyes and grayish skin.

Personality
The Older Sister Spider demon is shown to be the most cautious of her "Family" having instead opted to observe and stand back rather than jump right into the battle against Demon Slayers, shes also shown to be one of the most cowardly of her family both with battling against the Demon Slayer Corps and dealing with the internal conflict of her "Family" as seen when the Mother Spider Demon was being violently abused and reprimanded by her "Younger Brother" and her "Father" instead of helping her, she instead opted to stand back and give her "Mother" the same severe glare due to her weakness, and she again showed her cowardice by trying to convince Rui to run instead to fight after most of their Family was defeated. In truth the Older Sister spider demon loathes and hates her "Family" and has begun thinking that she would have likely done better on her own and believes that the rest of her "Family" to be idiots for playing along with Rui and had no real emotional attachment or care for any of them, but none the less did whatever it took to survive and stayed with them due to knowing that she stood no chance of surviving on her own. She even went as far as attempting to use sympathy and pity on Shinobu Kocho despite knowing that she was a demon slayer by pleading that she was forced into her situation by Rui, despite she herself going through various lengths to stay with him and his "family", showing that she only does what is convenient for her own survival, and later showed herself to be gullible enough to fall for Shinobu's faked sympathy to begin to openly admit to her total count of human victims.

History
Originally the Older Spider demon was a lone demon who decided to team up with other demons to survive due to fearing the Demon Slayers, having set themselves up in Natagumo Mountain, having been gathered by Rui to be his new "Family" where he then forced them to abandon their previous appearances and faces in order to match his and forced her to then be his "Older Sister" and forced her to protect him using her own life due to his belief that the older sibling should always shield their younger sibling. She and her "Family" then began preying on the native humans from around the mountain that thus then brought about the attention of the Demon Slayer Corps, who then began sending scores of their Demon Slayers in their attempt to rid the mountain of the demons, the Elder Sister Demon herself managed to kill and eat at least 80 or so humans during her time in the mountain and had successfully stored them inside her thread sacks using her Blood Demon Technique for later meals that were then later found by Shinobu.

Demon Abilities

 * Regeneration - the Older Sister Spider Demon displayed decent enough regenerative abilities to immediately and easily reattach and heal her body after being violently torn to shreds and decapitated by Rui in a fit of rage without much difficulty.
 * Shape-shifting - The Older Sister Spider Demon has displayed enough skill and talent in shape-shifting in order to alter her physical appearance to match Rui's own in order to fulfill his desire for a family. However if frightened or startled, her physical appearance returns to its original form, showing that she needs to keep conscious effort to maintain her new physical characteristics.

Blood Demon Arts

 * Acid Cocoon (の) - The technique works by entangling her target in a web-cocoon filled with acid fluids where the acid will then dissolve the clothes of the victim first (even the specially made battle uniforms of the Demon Slayer Corps). The acid will then move on to the targets flesh and begin to make their body soft and ready for her to consume.

Trivia
There were non-manga additions added to the Older Sister Spider Demon’s backstory in the anime. In the manga, there were more than five members of the spider family, although it was implied that they were killed prior to the arc. Such additions are:
 * Showing how she joined the family, and how the family members were treated by Rui and each other.


 * Showed more of the spider demon family outside of the main 5.

In the manga the four members joined up before meeting Rui, in the anime they joined Rui before the Older Sister ever met him. [to be revised]
 * Her interactions with another 'older sister spider demon', who after befriending, proposes that they runaway together when Rui isn't around. The Older Sister Spider Demon ends up betraying her to Rui in order to gain his favour, and the other sister gets beaten and hung up to be killed by sunlight.

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