Anak'si

Earth
She was fat and ugly by her own admission (Ch. 96).

Aos
Her upper torso was that of a human girl, and a really beautiful one at that, but the rest of her body was a colossal, white furred spider with the torso simply attached to its cephalothorax.

Her human portion has silky white hair and Hazel eyes and her spider portion has red eyes as its some manner of albino. Her skin is incredibly pale and the gaze of her human half appears lifeless due to it not being her main brain and seeming more akin to a meat puppet but it's not as it's as much a part of Anak'si as the spider is. It was previously clothed in clothes made from her own silk that were tougher than chainmail.

Personality
Even in her past life she managed to raise herself to prominence via crafting a web around themselves mostly in the form of a web of lies. Her position among the popular kids at school was lost when she was too trusting off one of her friends who revealed everything to others resulting in her fall from grace and her becoming a shut in. Even then she still formed a web around herself benefitting from the anonymity of the internet and she became a gamer girl first for influence but later because she enjoyed it alongside various isekai stories. She died from an aneurysm in her sleep and awoke on Aos where she rose to prominence thanks to her Earth knowledge, abilities and race.

Abilities
She was an Arachne, a rare subspecies of Rantul matriarch that was usually feared even by its own kin due to its great power coupled with a mental instability caused by the presence of two different heads, a human and a Rantul one, each possessing a different and contrasting will. But luckily Anak'si had no such problem, since she had only one will and therefore was perfectly sane. She enjoyed only the perks of her condition, which mostly meant better thought clarity and a greatly increased aura. Her human portion is sort of a weak spot for her, since she can't regenerate it like she can her limbs (Ch. 98) and it's a lot less tough than her spider part, but at the same time it also gives her a MUCH stronger aura.

She was born with the power to enslave other arachnids to her will. All she needed to do was just to touch a spider, whether with her own hand or with her magical webs, and it would immediately be brainwashed into her service. Not only could she order them around as she saw fit, but she could also commune with them by touching them, getting access to their thoughts and memories. Sadly there were limitations to this power, as it didn't completely work on sentient beings, but even in that case she could exert a more subtle but still substantial influence.

Magical Webs
Like all Rantul Matriarchs she possesses the ability to create and manipulate magical webs. So far she has used the webs to craft herself a home with a security system that responds only to her aura, create an alarm system, clothe her human half, utilise her mental dominance over arachnid species as well as using silk in battle to trip up enemies, restrain them and create a whip strong enough to cut an unprepared Oni's limbs off and cut through rock with ease.

Combat prowess
Her martial prowess is mostly lingering muscle memory from the "human" part of her body. It used to belong to an actual human before it was infected with Rantul eggs, and any human who managed to get far enough into the Caligare Forest to be captured by the Rantul knows how to defend themselves.

Minions

 * Nero the Deathstalker
 * Cerebrarachnid aka Brain Spiders