A virtual YouTuber part of Hololive English. A human priestess serving a certain elder god of knowledge and in return gaining power over tentacles. She can speak English, Korean, and some Japanese, with hints that Korean is her native language.
As she was designed by Kuroboshi Kouhaku, she has many similarities with Katsushika Hokusai from Fate/Grand Order. Most notably her Lovecraftian motif, being accompanied by Tako (a small octopus-like creature), and her focus on art.
She has blue eyes and long dark purple hair with two short sidelocks that turn into gradient orange tentacles and blunt bangs. She has a flat chest (which often causes breast envy), a mole under her right eye and pointy ears, as well as two "ear"-like protrusions sticking out of her hair, a reference to how some types of cephalopods have similar skin flaps.
Her outfit consists of a strapless black dress, asymmetrical gloves, a single thighhigh, and okobo sandals. She has a halo levitating behind her head, a fur collar, a pair of wings wrapped around her waist, and a headpiece shaped like five rhombuses. She has a mass of tentacles emerging from her back and is usually seen accompanied by a floating book, which in her lore is the tome that turned her into what she is now, known as the Ancient Ones or AO-chan.