Origin
Kingdom of Altar
Cocytus is a Advance Maiden Type Embryo. Cocytus takes the form of a young girl entirely dressed in white, with a white dress and a white ushanka hat. She also has blue eyes. When transformed into her Advance form, she takes the form of an ice armour that covers whatever device Hugo is riding. She has a spunky personality, being unafraid to criticise her own Master or even the leader of their clan.
Infinite Dendrogram
In the year 2043, <Infinite Dendrogram>, the world's first successful full-dive VRMMO was released. In addition to its ability to perfectly simulate the five senses, along with its many other amazing features, the game promised to offer players a world full of infinite possibilities. Nearly two years later, soon-to-be college freshman, Reiji Mukudori, is finally able to buy a copy of the game and start playing. With some help from his experienced older brother, Shuu, and his partner Embryo, Reiji embarks on an adventure into the world of <Infinite Dendrogram>. Just what will he discover and encounter in this game world known for its incredible realism and infinite possibilities? (Source: J-Novel Club)
